Technical field [0001] 　The present invention relates to a process for producing an ethylene / .alpha.-olefin copolymers, in the presence of an olefin polymerization catalyst comprising a bridged metallocene compound having a specific crosslinked structure and more particularly, by copolymerizing ethylene and an .alpha.-olefin , it relates to a process for producing ethylene / α- olefin copolymer. Background technique [0002] 　Transition metal compound having a cyclopentadienyl ligand or substituted cyclopentadienyl ligand as an olefin polymerization catalyst, widely known method of using a so-called metallocene compound. Since the catalyst in combination with zirconocene dimethyl with methylaluminoxane (MAO) is to exhibit a high activity in the polymerization of ethylene was reported by W. Kaminsky et al [Angew. Chem. Int. Ed. Engl., 19, 390 (1980 )], various improvements for the purpose of producing such improved performance and specific polymers catalysts have been attempted. For information about how to polymerization of the inner α- olefins in stereoregular is, isotactic polymerization by W. Kaminsky et al. In the 1980s [Angew. Chem. Int. Ed. Engl., 24, 507 (1985)] and JA Ewen syndiotactic polymerization by et al [J. Am. Chem. Soc., 110, 6255 (1988)] has been reported one after another, all of which are accomplished by using a unique three-dimensional structure of the bridged metallocene compounds. Especially with respect to the latter, using metallocene compounds having a ligand a cyclopentadienyl group and the fluorenyl group are bridged, produced by conventional Ziegler-Natta catalysts has been successful in the manufacture of hard syndiotactic polypropylene . [0003] 　This cross-linked cyclopentadienyl - fluorenyl metallocene compounds, has been developed as well as a catalyst for the subsequent ethylene homopolymer or ethylene / α- olefin copolymer for. W. Kaminsky et al., Ahead of JA Ewen et al. Were used for the syndiotactic polypropylene manufacturing [isopropylidene (eta 5 - (eta cyclopentadienyl) 5 have reported the ethylene polymerization by zirconium dichloride - fluorenyl)] , the polymerization activity was very low [Makromol. Chem., 193, 1643 (1992)]. [0004] 　On the other hand, the present applicant, by considering the ligand structure intensive, ethylene homopolymers and ethylene / α- very polymerization activity in the olefin copolymer has led to the invention of high cross-linked metallocene compound [Patent Document 1 (WO2004 / 029062), Patent Document 2 (WO2005 / 100410)]. However the molecular weight of the resulting ethylene polymer is not yet sufficient, the improvement of a further catalyst is desired. [0005] 　Generally, in the solution polymerization is carrying out the polymerization at a high temperature is preferable for leading to improved productivity. That is, since the viscosity of the polymerization solution containing the resulting olefin polymer is reduced at high temperatures, it is possible to increase the concentration of the olefin polymer in the polymerization vessel as compared with the low temperature polymerization, the polymerization vessel per productivity as a result improves. In addition, since olefin polymerization is an exothermic reaction, in order to keep the polymerization temperature to the desired value, usually it is necessary to heat removal heat of polymerization. Since heat removal heat of the high-temperature polymerization is smaller than the low temperature polymerization, advantage obtained that reduction of heat removal costs. On the other hand, it is well known to the skilled in the art that the molecular weight of the olefin polymer produced with increasing polymerization temperature decreases. From this, in order to produce the olefin polymer of the desired molecular weight, the upper limit of the polymerization temperature is a problem of being constrained occurs often. As a means to solve this inconvenience, a polymerization catalyst to produce an olefin polymer having a high molecular weight is desired. By using such olefin polymerization catalysts, at high temperature polymerization, the molecular weight of the resulting olefin polymer it is possible to maintain the desired high value, increased productivity, advantages are obtained such as a reduction in production costs. [0006] 　Catalyst to produce a high molecular weight olefin polymers such as described above, and modifications relates metallocene compound constituting it have been studied so far. In various periodic table group 4 transition metal metallocene compounds, to produce an olefin polymer of high molecular weight hafnium compound is compared to a zirconium compound of the structure are widely known. The Kokoku 6-811 JP etc., by using the Hough dichloride as the metallocene compound, the molecular weight of the polyethylene is disclosed to be improved to produce compared to zirconocene dichloride. Also in Patent No. 2882257, JP [isopropylidene (eta 5 - (eta cyclopentadienyl) 5 - fluorenyl)] by using a hafnium dichloride, [isopropylidene (eta 5 - cyclopentadienyl) (eta 5 - fluorenyl)] the molecular weight of the ethylene / 1-hexene copolymer produced in comparison with zirconium dichloride is disclosed to be improved. However, these molecular weight of the olefin polymer produced in any case is not sufficient, it is difficult to produce the olefin polymer of the desired molecular weight at a high temperature enough useful industrially. [0007] 　W. Kaminsky et al further improvement addition, cross-linked cyclopentadienyl - by introducing a substituent to the cross-linking moiety and fluorenyl group part of fluorenyl metallocene compound, aimed at the molecular weight increase of polypropylene to produce [J. Organomet . Chem., 684, 200 (2003)]. Although this attempt has achieved a certain level of achievement that is, the tendency of decrease in molecular weight of the product polypropylene due to the polymerization temperature rise is remarkable, not yet to obtain the desired molecular weight of the polypropylene in the high-temperature polymerization of interest. [0008] 　The applicant has in Patent Document 3 (WO2006 / 123759), certain bridged cyclopentadienyl - proposes a manufacturing method of using a catalyst containing a fluorenyl metallocene compound α- olefin polymer, this production According to the method, in the case of polymerizing at least a portion comprising α- olefins ethylene under high temperature conditions, with good activity, it is possible to produce ethylene polymer of high molecular weight. Further, the present applicant has in Patent Document 3, other specific crosslinking cyclopentadienyl - proposes a method for producing a propylene-based using a catalyst containing a fluorenyl metallocene compound copolymer, in the manufacturing method with it, a propylene copolymer of high molecular weight can be efficiently produced, further propylene copolymer of the desired molecular weight, can be polymerized at higher temperatures than with conventional olefin polymerization catalysts. [0009] 　On the other hand, in order to produce the olefin polymer of the desired molecular weight, hydrogen was introduced into the polymerization reactor, a method of reducing the molecular weight of the olefin polymer is generally to the art. For example, the present applicant has bridged cyclopentadienyl - in the case of using a polymerization catalyst containing a fluorenyl metallocene compound copolymerized ethylene and 1-octene, by adding hydrogen to the polymerization reactor, to produce the molecular weight of the ethylene / 1-octene copolymer discloses that reduced [Patent Document 1 (WO2005 / 100410)]. In this way, the introduction of hydrogen into the polymerization reactor is a very effective way of controlling the molecular weight of the olefin polymer produced. However, it is clear that the introduction of hydrogen for the purpose of molecular weight control of olefin polymers is not intended to be tolerated indefinitely. That is, when the polymerization is carried out at a constant polymerization vessel total pressure and temperature conditions of that, increase in the hydrogen partial pressure of the hydrogen introduced causes a reduction in the partial pressure of the olefin is polymerized monomers, is especially hydrogen partial pressure It arises a problem that reducing the rate of polymerization at high region. For polymerization reactor in which the internal total pressure is allowed on the design it is limited and requires excessive hydrogen introduced especially when producing an olefin polymer having a low molecular weight, since the olefin partial pressure is significantly reduced, there is a case in which polymerization activity is reduced. Therefore, a small amount of polymerization catalyst it sufficiently to reduce the molecular weight of the olefin polymer produced can be controlled to a desired value under a hydrogen introduction amount, i.e. hydrogen response is higher polymerization catalyst has been required. [0010] 　As described above, since the molecular weight of the olefin polymer produced with increasing polymerization temperature decreases, it is possible in theory that by changing the polymerization temperature to control the molecular weight of the olefin polymer to a desired value. However, for the reason set forth below with difficulty in molecular weight control of olefin polymers by polymerization temperature. First, in the control of the olefin polymer to the desired molecular weight, heat-resistant and pressure-resistant design limitation of the polymerization vessel itself, or from the product limited by the thermal stability of the olefin polymer to be, not be raised sufficiently polymerization temperature to a high temperature when there is. On the other hand, that the polymerization activity is reduced, also for example, solution polymerization, etc. by, etc. may fall productivity not raise the concentration of the olefin polymer to become increased the viscosity of the polymerization solution, to a sufficiently low temperature polymerization in some cases not be lowered the temperature. Additionally, common to the skilled in the art in the case of continuously producing olefin polymers of different polymorphic varieties molecular mass, one of the polymerization equipment is stabilized at a desired value by changing the temperature of the polymerization solution It may take a long time much, during which leads to a decrease in productivity. Such impact is significant as the polymerization equipment increases. Therefore, when adjusting the molecular weight of the olefin polymer produced in the industrial production of olefin polymer to the desired value, rather than changing the polymerization temperature, the amount of hydrogen in terms of maintaining a constant value in this a method of changing is used willingly by the skilled in the art. From the above, and generating an olefin polymer of high molecular weight in order to maintain a high polymerization temperature, high hydrogen response for the desired molecular weight of the olefin polymer with a small amount of hydrogen addition amount without activity reduction is obtained at the same time catalyst to achieve has been craving. CITATION Patent literature [0011] Patent Document 1: International Publication WO2004 / 029062 Patent Patent Document 2: International Publication WO2005 / 100410 Patent Patent Document 3: International Publication WO2006 / 123759 No. Summary of the invention Problems that the Invention is to Solve [0012] 　However, the conventional method of manufacturing ethylene-based polymer, such as manufacturing method disclosed in Patent Documents 1 to 3, is a room for further improvement in terms of molecular weight and the hydrogen response of the ethylene polymer produced during high temperature polymerization there were. [0013] 　Challenge the present invention in view of the problems in the prior art to be solved by (1), it is to provide a method for producing a high molecular weight of the ethylene / α- olefin copolymer. As described above, the high temperature solution polymerization has the advantage reducing the improvement and production cost productivity, at the same time cause a decrease in molecular weight of the olefin polymer produced, sufficient polymerization temperature in the method using a conventional polymerization catalyst to produce a high molecular weight of the ethylene / α- olefin copolymer in high conditions is difficult. In order to enjoy the benefits of high temperature solution polymerization to eliminate this inconvenience, the appearance of methods are desired that can produce a high molecular weight ethylene / .alpha.-olefin copolymer even at the polymerization temperature is sufficiently high condition . [0014] 　Challenge next present invention is to provide (2), copolymerized ethylene and .alpha.-olefin with a high hydrogen response, it is to provide a method for producing ethylene / .alpha.-olefin copolymer. How the molecular weight of the resulting ethylene / .alpha.-olefin copolymer introducing hydrogen into the polymerization reactor to control the desired value, a common method for street useful and the suppliers of the above. From this, without causing troubles such as reduction of the partial pressure of the polymerization monomers, which can reduce sufficiently the molecular weight of the ethylene / .alpha.-olefin copolymer produced with a small amount of hydrogen introduction amount, i.e. hydrogen response high production method of the ethylene / .alpha.-olefin copolymer is desired with. [0015] 　Further object of the present invention is to solve (3) is a sufficiently high polymerization activity to a degree on the useful industrial, provides a method of copolymerizing ethylene and .alpha.-olefin, to produce the ethylene / .alpha.-olefin copolymer it is to be. Such methods, shortening of production time, more because it has an effect that cost reduction due to a decrease in the amount of catalyst used, a large industrial advantages. [0016] 　Further object of the present invention is to finally resolved, the above problems (1) to provide a (2) and (3) simultaneously manufacturing method feasible ethylene / .alpha.-olefin copolymer . Such a method, in industrially significant production efficiency and production cost, the ethylene / .alpha.-olefin copolymer having excellent performance as a processing material can be provided to the market. Means for Solving the Problems [0017] 　The present invention for solving the aforementioned problem, in the presence of an olefin polymerization catalyst comprising a bridged metallocene compound having a specific crosslinked structure, copolymerization of ethylene and .alpha.-olefin, the ethylene / .alpha.-olefin copolymer it is a method of manufacturing. The gist of the present invention is as follows. [0018] 　[1] bridged metallocene compound (A) represented by the following general formula [the I], and (B) (B-1) an organometallic compound, (B-2) an organoaluminum oxy compound and (B-3) bridged metallocene reacting with compound (a) at least one compound selected from the compounds to form an ion pair in the presence of an olefin polymerization catalyst comprising, that the ethylene and carbon atoms copolymerized with 3 or more α- olefins It is characterized. [0019] [Formula 1] In the (Formula [the I], Y-carbon atom, a silicon atom, selected from germanium atoms and tin atoms, 　M is titanium atom, zirconium atom or hafnium atom, 　R 1 , R 2 , R 3 , R 4 , R 5 of 5 , R . 6 , R . 7 , R . 8 , R . 9 , R 10 , R . 11 and R . 12 is a hydrogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, an atom or a substituent selected from a halogen atom and a halogen-containing group, may be the same as or different from each other, 　R 1 from R . 12 even if adjacent substituents to join to each other to form a ring Frequently, 　R . 13 and R 14 is an aryl group or a substituted aryl group, either or different and each is identical to the case of the substituted aryl group, 　R . 13 and R 14 at least one of the aryl groups one or more hydrogen atoms a substituted aryl group substituent constant Hammett's rule σ is replaced with -0.2 or less of the electron-donating substituent, respectively when having a plurality of electron-donating substituents the of the electron-donating substituent may be the same or different, other than the electron-donating substituent, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, a halogen atom and halogen-containing may have a substituent group selected from the group, each substituent when having a plurality of said substituent is a substituent aryl group which may be the same or different, 　Q is a halogen atom, a carbon hydrocarbon groups having 1 20, selected from a neutral ligand capable of coordination with an anionic ligand and a lone pair at the same or different combination, 　j is an integer of 1 to 4.) [0020] 　[2] 　R in the general formula [the I] 1 , R 2 , R 3 and R 4 is characterized in that all a hydrogen atom, preparation of ethylene / .alpha.-olefin copolymer according to the above [1] Method. [0021] 　[3] 　The Y in the general formula [I] is characterized in that it is a carbon atom, the production method of the above-mentioned [1] or [2] Ethylene / .alpha.-olefin copolymer according to. [0022] 　[4] 　The electron-donating substituent, characterized in that it is a group selected from a nitrogen-containing group and an oxygen-containing group, an ethylene / .alpha. according to any one of the above [1] to [3] process for producing an olefin copolymer. [0023] 　[5 of 5] 　R in the general formula [the I] . 13 and R 14 , characterized in that it is the same substituted aryl group, the above-mentioned [4] The method for producing the ethylene / .alpha.-olefin copolymer according to. [0024] 　[6] 　The R in the general formula [the I] . 13 and R 14 are a group selected from a nitrogen-containing group and an oxygen-containing group as the electron-donating substituent, meta and / or para position on the binding of Y process for producing an ethylene / .alpha.-olefin copolymer according to characterized in that it is a substituted phenyl group, the above-mentioned [4] or [5], including the. [0025] 　[7a] 　R in the general formula [the I] . 13 and R 14 , characterized in that a substituted aryl group containing a nitrogen-containing group as the electron-donating substituent, according to the above [5] Ethylene / method of manufacturing the α- olefin copolymer. [0026] 　[7 b] 　R in the general formula [the I] . 13 and R 14 , characterized in that a substituted phenyl group containing a nitrogen-containing group as the electron-donating substituent, according to the above [7a] Ethylene / method of manufacturing the α- olefin copolymer. [0027] 　[7c] 　R in the general formula [the I] . 13 and R 14 can, a nitrogen-containing group as the electron-donating substituent, a substituted phenyl group containing the meta and / or para position on the binding of Y and wherein the method of manufacturing the ethylene / α- olefin copolymer according to the above [7b]. [0028] 　[. 7] 　R in the general formula [the I] . 13 and R 14 , characterized in that a substituted phenyl group containing a nitrogen-containing group represented by the following general formula [II] as the electron-donating substituent the [4] to the manufacturing method of the ethylene / .alpha.-olefin copolymer according to any one of [6]. [0029] [Formula 2] In (formula [II], R 15 and R 16 are a hydrogen atom, a hydrocarbon group, a silicon-containing group, atom or a substituent selected from an oxygen-containing groups and halogen-containing group having 1 to 20 carbon atoms , may be the same as or different from each other, may form a ring bonded to each other, right drawn lines N represents a bond with a phenyl group.) [0030] 　[8a] 　R in the general formula [the I] . 13 and R 14 , characterized in that a substituted aryl group containing an oxygen-containing group as the electron-donating substituent, according to the above [5] Ethylene / method of manufacturing the α- olefin copolymer. [0031] 　[8 b] 　R in the general formula [the I] . 13 and R 14 , characterized in that a substituted phenyl group containing an oxygen-containing group as the electron-donating substituent, according to the above [8a] Ethylene / method of manufacturing the α- olefin copolymer. [0032] 　[8c] 　R in the general formula [the I] . 13 and R 14 may, an oxygen-containing group as the electron-donating substituent, a substituted phenyl group containing the meta and / or para position on the binding of Y and wherein the method of manufacturing the ethylene / α- olefin copolymer according to the above [8b]. [0033] 　[. 8] 　R in the general formula [the I] . 13 and R 14 , characterized in that a substituted phenyl group containing an oxygen-containing group represented by the following general formula [III] as the electron-donating substituent the [4] to the manufacturing method of the ethylene / .alpha.-olefin copolymer according to any one of [6]. [0034] [Formula 3] in (formula [III], R . 17 is a hydrogen atom, atom or a substituent group selected from a hydrocarbon group, a silicon-containing group, nitrogen-containing groups and halogen-containing groups having 1 to 20 carbon atoms, the O lines drawn on the right represents a bond with a phenyl group.) [0035] 　[. 9] 　R in the general formula [the I] 5 of 5 , R 8 , R . 9 and R . 12 , characterized in that are all hydrogen atoms, ethylene according to any one of the above [1] to [8] / α- process for producing an olefin copolymer. [0036] 　[10] 　R in the general formula [the I] . 6 , R . 7 , R 10 and R . 11 selected from at least two hydrocarbon groups, silicon-containing group, a nitrogen-containing group, an oxygen-containing group, a halogen atom and a halogen-containing group of the characterized that, the above-mentioned [1] to a method for producing the ethylene / .alpha.-olefin copolymer according to any one of [9] to be a substituent. [0037] 　[. 11] 　R in the general formula [the I] . 6 and R . 7 , and / or R 10 and R . 11 is characterized in that is bonded to each other to form a ring, according to the above [10] Ethylene / method of manufacturing the α- olefin copolymer. [0038] 　[12] 　The R in the general formula [the I] . 6 and R . 7 , and R 10 and R 11 are combined with each other, characterized in that to form a ring, according to the above [11] Ethylene / .alpha. process for producing an olefin copolymer. [0039] 　[13] 　the general formula [I] in R . 6 and R . 7 , and R 10 and R . 11 , wherein the ring formed by bonding is five to seven membered ring, according to the above [12] the method for producing ethylene / α- olefin copolymer. [0040] 　[14] 　The R in the general formula [the I] . 6 and R . 7 , and R 10 and R . 11 , wherein the ring formed by bonding is six-membered rings, ethylene according to the above [13] / α- process for producing an olefin copolymer. [0041] 　[15] 　in the presence of an olefin polymerization catalyst comprising a bridged metallocene compound characterized by being represented by the following general formula [IV], characterized by copolymerizing ethylene and α- olefin, the above-mentioned [14] method of manufacturing ethylene / α- olefin copolymer according to. [0042] [Formula 4] in (formula [IV], M is titanium atom, zirconium atom or hafnium atom, 　R . 13 and R 14 are both represented by the general formula [II] as the electron-donating substituent that either a substituted phenyl group containing a nitrogen-containing group, either substituted phenyl group containing an oxygen-containing group represented by the general formula [III] as the electron-donating substituent, 　R 18 , R . 19 , R 20 , and R 21 is a hydrogen atom or a methyl group, 　the same Q is a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a neutral ligand capable of coordination with an anionic ligand and a lone pair or chosen in different combinations, 　J is an integer from 1 to 4.) [0043] 　[16] 　, wherein the M is hafnium in the general formula [the I], the above-mentioned [1] Production method of [15] Ethylene / .alpha.-olefin copolymer according to any one of. [0044] 　[17] 　A production method of the ethylene / .alpha.-olefin copolymer, when the sum of the proportion of the constituent unit derived from each monomer in the polymer is 100 mol%, the proportion of the structural unit derived from ethylene wherein the ethylene polymer is 50 mol% or more is polymerized so as to obtain the above-mentioned [1] production method of [16] ethylene / .alpha.-olefin copolymer according to any one of the . [0045] 　[18] 　, wherein the polymerization temperature is 0.89 ~ 300 ° C., the above-mentioned [1] to a method for producing the ethylene / .alpha.-olefin copolymer according to any one of [17]. Effect of the invention [0046] 　According to the present invention, by a method of copolymerizing ethylene and .alpha.-olefin in the presence of an olefin polymerization catalyst comprising a bridged metallocene compound having a specific cross-linking structure to produce a high molecular weight ethylene / .alpha.-olefin copolymer it becomes possible. This makes it possible to keep the molecular weight of the ethylene / .alpha.-olefin copolymers also produced in high-temperature polymerization at a desired high value, it is possible to carry out high-temperature polymerization. In particular, high temperature solution polymerization, the viscosity of the polymerization solution containing the resulting ethylene / .alpha.-olefin copolymer is reduced, increasing the concentration of the ethylene / .alpha.-olefin copolymer in the polymerization vessel as compared with the low temperature polymerization it becomes possible, the polymerization vessel per productivity as a result is significantly improved. In addition, by carrying out the high-temperature polymerization, heat removal cost of the polymerization vessel is significantly reduced. [0047] 　Moreover, since the olefin polymerization catalyst has high responsiveness to hydrogen, the molecular weight of the ethylene / .alpha.-olefin copolymer produced by small amounts of hydrogen introduced greatly reduced, ethylene / .alpha.-olefin copolymer having a desired molecular weight it becomes possible to manufacture. Thus, it is possible to maintain high partial pressure of the monomer in the polymerization reactor, it is possible to achieve high polymerization activity. [0048] 　Thus, it becomes possible to produce ethylene / .alpha.-olefin copolymer having excellent performance as a process material with high productivity and low cost, contribution to the industry of the present invention is extremely large and excellent is there. [0049] 　These effects, when the present invention, the structure other than the bridge portion with the crosslinking metallocene compound compared to the copolymerization of ethylene and α- olefin in the presence of an olefin polymerization catalyst containing the same metallocene compounds, particularly pronounced it is. DESCRIPTION OF THE INVENTION [0050] 　In addition the present invention will be described in detail. 　Process for producing an ethylene / .alpha.-olefin copolymer of the present invention, in the presence of an olefin polymerization catalyst containing the above-mentioned general formula [I] bridged metallocene compound represented by (the A), and the above-mentioned compound (Bs), It is characterized in that ethylene and carbon atoms copolymerized with 3 or more α- olefins. [0051] 　 　bridged metallocene compound (A) is represented by the above-described Formula [I]. Y in the formula [the I], M, R 1 ~ R 14 illustrating the, Q and j below. [0052] 　(Y-, M, R 1 ~ R . 12 , Q and j) 　Y-is, carbon atom, a silicon atom, selected from germanium atoms and tin atoms, preferably a carbon atom. [0053] 　M is a titanium atom, zirconium atom or hafnium atom, preferably a hafnium atom. 　R 1 , R 2 , R 3 , R 4 , R 5 of 5 , R . 6 , R . 7 , R . 8 , R . 9 , R 10 , R . 11 and R . 12 is a hydrogen atom, a hydrocarbon group having 1 to 20 carbon atoms, silicon-containing group, a nitrogen-containing group, an oxygen-containing group, an atom or a substituent selected from a halogen atom and a halogen-containing group, may each be the same or different. Further, R 1 from R . 12 adjacent substituents of up may be bonded to each other to form a ring, it may not be bonded to each other. [0054] 　Examples of the hydrocarbon group having 1 to 20 carbon atoms, an alkyl group having 1 to 20 carbon atoms, cyclic saturated hydrocarbon groups having 3 to 20 carbon atoms, chain unsaturated hydrocarbon group having 2 to 20 carbon atoms, cyclic unsaturated hydrocarbon group having 3 to 20 carbon atoms are exemplified. Further, R 1 from R . 12 in the case where adjacent substituents of up to form a ring together, an alkylene group having 1 to 20 carbon atoms, such as an arylene group having 6 to 20 carbon atoms are exemplified. [0055] 　Examples of the alkyl group having 1 to 20 carbon atoms, a methyl group is a straight chain saturated hydrocarbon group, an ethyl group, n- propyl group, allyl (allyl) group, n- butyl group, n- pentyl group, n- hexyl group, n- heptyl, n- octyl group, n- nonyl, n- etc. decanyl group, an isopropyl group is branched saturated hydrocarbon group, an isobutyl group, s- butyl, t-butyl group, t-amyl group, neopentyl group, 3-methylpentyl group, 1,1-diethyl propyl group, a 1,1-dimethylbutyl group, 1-methyl-1-propyl butyl group, 1,1-dipropyl butyl group, 1,1 dimethyl-2-methylpropyl group, 1-methyl-1-isopropyl-2-methylpropyl group, etc. cyclopropylmethyl group and the like. The number of carbon atoms in the alkyl group is preferably 1 to 6. [0056] 　The cyclic saturated hydrocarbon group having 3 to 20 carbon atoms, a cyclopropyl group is a cyclic saturated hydrocarbon group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, cycloheptyl group, cyclooctyl group, norbornenyl group, a 1-adamantyl group, and 2-adamantyl group, a cyclic saturated hydrogen atoms of the hydrocarbon group is a group which is replaced by a hydrocarbon group of a carbon number of 1 to 17 3-methylcyclopentyl group, 3-methylcyclohexyl group, 4-methylcyclohexyl group, 4 - cyclohexyl cyclohexyl group, and 4-phenyl-cyclohexyl group can be exemplified. The number of carbon atoms in the cyclic saturated hydrocarbon group is preferably from 5-11. [0057] 　The chain unsaturated hydrocarbon group having 2 to 20 carbon atoms include ethenyl group (vinyl group) alkenyl group, a 1-propenyl group, 2-propenyl group (allyl group), 1-methylethenyl group (isopropenyl group) etc., ethynyl group an alkynyl group, a 1-propynyl group, 2-propynyl group (propargyl group) can be exemplified. The number of carbon atoms of the chain unsaturated hydrocarbon group is preferably 2-4. [0058] 　The cyclic unsaturated hydrocarbon group having 3 to 20 carbon atoms, cyclic unsaturated hydrocarbon group is a cyclopentadienyl group, a norbornyl group, a phenyl group, a naphthyl group, indenyl group, azulenyl group, phenanthryl group, an anthracenyl group , cyclic unsaturated hydrocarbon atoms of hydrogen group is a group which is replaced by a hydrocarbon group having 15 carbon atoms of 1 to 3-methylphenyl group (m-tolyl), 4-methylphenyl group (p- tolyl) , 4-ethylphenyl group, 4-t-butylphenyl group, 4-cyclohexyl phenyl group, biphenylyl group, 3,4-dimethylphenyl group, a 3,5-dimethylphenyl group, a 2,4,6-trimethylphenyl group ( mesityl group) such as a linear hydrocarbon group or branched saturated hydrocarbon group a benzyl group hydrogen atom is a group which is replaced by a cyclic saturated hydrocarbon group or a cyclic unsaturated hydrocarbon group having 19 from 3 carbon atoms, such as cumyl group and the like. The number of carbon atoms of the cyclic unsaturated hydrocarbon group is preferably 6 to 10. [0059] 　The alkylene group having 1 to 20 carbon atoms, a methylene group, an ethylene group, dimethylmethylene group (isopropylidene group), ethyl methylene group, a 1-methylethylene group, a 2-methylethylene group, a 1,1-dimethylethylene group, 1,2-dimethylethylene group, etc. n- propylene group and the like. The number of carbon atoms of the alkylene group is preferably 1-6. [0060] 　The arylene group having a carbon number of 6 ~ 20, o- phenylene, m- phenylene, p- phenylene, 4,4'-biphenylylene group and the like. The carbon number of the arylene group is preferably from 6 to 12. [0061] 　Examples of the silicon-containing group, the hydrocarbon group having 1 to 20 carbon atoms, a trimethylsilyl group is a group in which carbon atoms are replaced by silicon atoms, triethylsilyl group, t-butyldimethylsilyl group, an alkyl such as triisopropylsilyl group silyl group, dimethylphenyl silyl group, a methyl diphenyl silyl group, an aryl silyl group such as t- butyldiphenylsilyl group, pentamethyl-disilacyclohexane group, such as trimethylsilylmethyl group and the like. The number of carbon atoms in the alkyl silyl group is preferably 1 to 10 carbon atoms of the aryl silyl group 6 to 18 are preferred. [0062] 　Examples of the nitrogen-containing group, an amino group, a nitro group, N- morpholinyl or group, in a hydrocarbon group or a silicon-containing group of a carbon number of 1 to the aforementioned 20, = CH- structural unit is replaced with a nitrogen atom group, - CH 2 - group in which the structural unit is replaced with a nitrogen atom bonded hydrocarbon radical having 1 to 20 carbon atoms or -CH, 3 nitrogen atom or a nitrile group structural units is bonded hydrocarbon radical having 1 to 20 carbon atoms is a group which is replaced by dimethylamino group, diethylamino group, dimethylaminomethyl group, a cyano group, a pyrrolidinyl group, a piperidinyl group, a pyridinyl group can be exemplified. Examples of the nitrogen-containing group, dimethylamino group, N- morpholinyl groups are preferred. [0063] 　The oxygen-containing group, a hydroxyl group or a hydrocarbon group of a carbon number of 1 described above 20, the silicon-containing group or a nitrogen-containing group, -CH 2 - group structure unit is replaced by an oxygen atom or a carbonyl group, or, - CH 3 structural units methoxy group is a group having a hydrocarbon group is replaced with a bond to an oxygen atom having 1 to 20 carbon atoms, an ethoxy group, t-butoxy group, a phenoxy group, a trimethylsiloxy group, a methoxyethoxy group, a hydroxymethyl group, methoxymethyl group, ethoxymethyl group, t-butoxymethyl group, a 1-hydroxyethyl group, 1-methoxyethyl group, 1-ethoxyethyl group, 2-hydroxyethyl group, 2-methoxyethyl group, 2-ethoxyethyl group, n-2-oxa-butylene group, n-2-oxa-pentylene group, n-3- oxa-pentylene group, an aldehyde group, an acetyl group, a propionyl group, a benzoyl group, a trimethylsilyl group, a carbamoyl group, methylaminocarbonyl group, a carboxy group, a methoxycarbonyl group, a carboxymethyl group, ethoxy carboxymethyl group, a carbamoylmethyl group, a furanyl group, a pyranyl group and the like. The oxygen-containing group, a methoxy group is preferred. [0064] 　As the halogen atom, fluorine is a halogen, chlorine, bromine, and iodine. 　Halogen The content group, a hydrocarbon group of a carbon number of 1 described above 20, a silicon-containing group, a nitrogen-containing group or an oxygen-containing group, a trifluoromethyl group is a hydrogen atom is a group substituted by a halogen atom, tribromo methyl group, pentafluoroethyl group, such as pentafluorophenyl group and the like. [0065] 　Q is a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a neutral ligand capable of coordination with an anionic ligand and a lone pair, selected by the same or different combination. 　For more information on hydrocarbon group of halogen atoms and having 1 to 20 carbon atoms, as described above. When Q is a halogen atom, a chlorine atom is preferable. When Q is a hydrocarbon group having 1 to 20 carbon atoms, the carbon number of the hydrocarbon group preferably has 1 to 7. [0066] 　Examples of the anionic ligand, can be exemplified methoxy group, t-butoxy group, an alkoxy group such as a phenoxy group, acetate, carboxylate groups such as benzoate, mesylate, and the like sulfonate group such as a tosylate. [0067] 　As the neutral ligand capable of coordination by lone pair, trimethylphosphine, triethylphosphine, triphenylphosphine, organic phosphorus compounds such as diphenyl methyl phosphine, tetrahydrofuran, diethyl ether, dioxane, such as 1,2-dimethoxyethane and the like can be exemplified ether compound. 　j is an integer from 1 to 4, preferably 2. [0068] 　(R . 13 and R 14 ) 　R . 13 and R 14 is an aryl group or a substituted aryl group, both may be the same or different respectively when a substituted aryl group. [0069] 　Examples of the aryl group include a phenyl group that is a substituent derived from an aromatic compound, 1-naphthyl group, 2-naphthyl group, anthracenyl group, phenanthrenyl group, tetracenyl group, chrysenyl group, pyrenyl group, indenyl group, azulenyl group, pyrrolyl group, a pyridyl group, a furanyl group, a thiophenyl group and the like. The aryl group, a phenyl group or a 2-naphthyl group are preferable. [0070] 　Examples of the aromatic compounds, aromatic hydrocarbons and benzene heterocyclic aromatic compound, naphthalene, anthracene, phenanthrene, tetracene, chrysene, pyrene, pyrene, indene, illustrated azulene, pyrrole, pyridine, furan, thiophene is It is. [0071] 　The substituted aryl group, a hydrocarbon group of 1 or more hydrogen atoms from 1 to 20 carbon atoms in which the aryl group has a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, a substituent selected from halogen atoms and halogen-containing groups include a group formed by substituted by, in particular 3-methylphenyl group (m-tolyl), 4-methylphenyl group (p- tolyl), 3-ethylphenyl group, 4-ethylphenyl group, 3,4-dimethylphenyl group, a 3,5-dimethylphenyl group, biphenylyl group, 4- (trimethylsilyl) phenyl group, 4-aminophenyl group, 4- (dimethylamino) phenyl group, 4- (diethylamino) phenyl group, 4-morpholinophenyl Li alkenyl phenyl group, a 4-methoxyphenyl group, 4-ethoxyphenyl group, 4-phenoxyphenyl group, 3,4-dimethoxyphenyl group, a 3,5-dimethoxyphenyl group, 3-methyl-4-methoxyphenyl group, 3,5-dimethyl-4-methoxyphenyl group, 3- (trifluoromethyl) phenyl group, 4- (trifluoromethyl) phenyl group, 3-chlorophenyl group, 4-chlorophenyl group, 3-fluorophenyl group, 4-fluorophenyl group, 5-methylnaphthyl group, etc. 2- (6-methyl) pyridyl groups. [0072] 　Electron-donating group-containing substituted aryl group 　R . 13 and R 14 at least one of, one or more hydrogen atoms of the aryl group is σ substituent constant of Hammett's rule and substituting -0.2 or less of the electron-donating substituent a composed substituted aryl group, each of the electron-donating substituent in the case of having a plurality of electron-donating substituents may be the same or different, other than the electron-donating substituent, 1 carbon atoms from 20 hydrocarbon group, a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, may have a substituent selected from halogen atoms and halogen-containing groups, when having a plurality of the substituent of each substituents are the same (hereinafter also referred to "electron-donating group-containing substituted aryl group".) or different optionally may be substituted aryl groups. [0073] 　Electron-donating group's substituent constant σ is -0.2 following Hammett equation having an electron donating group-containing substituted aryl groups are defined and exemplified as follows. Hammett's rule is an empirical rule proposed by 1935 LP Hammett in order to quantitatively discuss the effect of substituents on the reaction or equilibrium of benzene derivatives, which are widely validity is recognized today. The substituent constant determined by the Hammett's rule includes a σm when substituted the σp and meta positions when substituted in the para position of the benzene ring, these values ​​can be found in many general literature. For example, the article by Hansch and Taft [Chem. Rev., 91, 165 (1991)] very detailed description about the wide range of substituents to have been made. However, .sigma.p and σm are described in these documents may be the same substituent in some cases the value in the literature differ slightly. In the present invention, in order to avoid the confusion caused by such a situation, the article by Hansch and Taft in the substituent as long as that described [Chem. Rev., 91, 165 (1991)] of Table 1 (168-175 the values ​​described in the page) is defined as a substituent constant σp and σm of Hammett's rule. The substituent constant σ is -0.2 or less electron donating group of Hammett's rule in the present invention, when the electron-donating group is substituted at the phenyl group's para-position (4-position) .sigma.p is -0.2 or less an electron-donating group, if you are substituted on the phenyl group meta-position (3-position) is σm is -0.2 or less electron donating group. Further, when the electron-donating group which is substituted at any position of the aryl group in the case, or other than a phenyl group which is substituted at the ortho position of the phenyl group (2-position) is, .sigma.p is -0.2 or less of the electron it is donating group. [0074] 　The substituent constant σp or σm is -0.2 or less of the electron-donating substituent of the Hammett's rule, p- amino group (4-amino group), p- dimethylamino group (4-dimethylamino group), p- diethylamino group (4-diethylamino group), m-diethylamino group (3-diethylamino group) nitrogen-containing groups such as, p- methoxy (4-methoxy group), p- ethoxy (4-ethoxy) an oxygen-containing group, such as, pt- butyl (4-t-butyl) tertiary hydrocarbon group such as, p- trimethylsiloxy groups (4-trimethylsiloxy groups) and the like can be exemplified silicon-containing groups such as. Incidentally, electron-donating substituent of the substituent constant σp or σm is -0.2 following Hammett equation as defined in the present invention are described in the literature by Hansch and Taft [Chem. Rev., 91, 165 (1991)] Table 1 of but it is not limited to the substituents described in (pp. 168-175). Even the substituents listed in the literature, substituent groups which would substituent constant σp or σm is the range when measured based on Hammett's rule, the substituents of Hammett's rule defined in the present invention constant σp or σm is included in the electron donating group of -0.2 or less. Examples of such substituents, pn-morpholinyl group (4-N- morpholinyl group), Mn- morpholinyl group (3-N- morpholinyl group) and the like can be exemplified. [0075] 　In the electron-donating group-containing substituted aryl group, each of the electron-donating substituent when electron-donating substituents are plural substituents may be the same or different carbon atoms in addition to the electron-donating substituent 1 to 20 hydrocarbon group, a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, may be substituents selected from halogen atoms and halogen-containing groups is substituted, if the substituent is a plurality substituted each substituent may be the same or different, but the sum of substituent constant of each of the Hammett's rule of the electron-donating substituents and substituent groups contained in one electron-donating group-containing substituted aryl group sigma -0.15 by is preferably less. Examples of such substituted aryl groups, m, p- dimethoxyphenyl group (3,4-dimethoxyphenyl group), p-(dimethylamino)-m-methoxyphenyl group (4- (dimethylamino) -3-methoxyphenyl group), p-(dimethylamino)-m-methylphenyl group (4- (dimethylamino) -3-methylphenyl group), p-methoxy-m-methylphenyl group (4-methoxy-3-methylphenyl group) , p- methoxy -m, m-dimethylphenyl group (4-methoxy-3,5-dimethylphenyl group), and the like. [0076] 　Hydrocarbon group of electron-donating group-containing substituted aryl group from carbon atoms 1 may have 20, silicon-containing group, a nitrogen-containing group, an oxygen-containing group, a halogen atom and a halogen-containing group, those atoms described above or it may be specific examples of the substituents. [0077] 　The above example relates to formula [I] can be similarly applied to the following description of the present specification. 　The applicant, a result of intensive studies for various bridged metallocene compounds, the above general formula [I] bridged metallocene compound represented by the (the A), R . 13 and R 14 at least one, in particular the substitution of Hammett's rule when the substituent constant σ is -0.2 or less of the electron donating substituent has a one or more substituted with electron-donating group-containing substituted aryl groups, with ethylene in the presence of an olefin polymerization catalyst containing the crosslinked metallocene compound (a) when copolymerizing one or more monomers carbon atoms selected from 3 or more .alpha.-olefins, for the first time found that the molecular weight of the resulting ethylene / .alpha.-olefin copolymer is increased. [0078] 　In the coordination polymerization of olefins by organic metal complex catalyst such as bridged metallocene compounds of the present invention (the A), by olefin repeatedly polymerized on the central metal of the catalyst, the molecular chains of the resulting olefin polymer can grow (growth reaction), the molecular weight of said olefin polymer is known to increase. Meanwhile, in a reaction known as chain transfer, by the molecular chains of the olefin polymer dissociates from the central metal of the catalyst, propagation reaction of the molecule chains is stopped, thus stopping also increase in molecular weight of the olefin polymer also Are known. As described above, the molecular weight of the olefin polymer, the specific organic metal complex catalyst which produces it, characterized by the ratio between the frequency and the frequency of chain transfer reaction propagation reaction. That is, the molecular weight of the olefin polymer produced larger the ratio of the frequency and the frequency of chain transfer reaction propagation reaction becomes higher, as the molecular weight small conversely a relationship becomes lower. Here, the frequency of each of the reaction can be estimated from the activation energy of each reaction, the reaction activation energy is low, high the frequency, the reaction activation energy is high in the opposite and the frequency is low regarded it is considered that it is Succoth. In general, the frequency of the growth reaction in olefin polymerization is sufficiently high compared with the frequency of the chain transfer reaction, namely the activation energy of the growth reaction is known to be sufficiently low in comparison with the activation energy of chain transfer reaction there. Therefore, the activation energy of the reduced value of the activation energy from growth reaction of chain transfer reaction (hereinafter, DerutaE C ) is positive, the frequency of the growth reaction as compared to the frequency of chain transfer reaction larger this value is large becomes, the molecular weight of the olefin polymer produced results that is high is estimated. The validity of estimation of the thus the molecular weight of olefin polymers carried out in, for example, be supported by Laine et calculation results [Organometallics, 30, 1350 (2011 )]. The above general formula [I] bridged metallocene compound represented by the (A) is, R . 13 and R 14 at least one, in particular substituent constant σ is -0.2 or less of the electron-donating substituent of the Hammett's rule one One or more substituted in the case of the electron-donating group-containing substituted aryl group, said? E C is increased, the cross-linked metallocene compound in the presence of an olefin polymerization catalyst comprising (a) ethylene and having 3 or more carbon atoms α- olefins when copolymerizing one or more monomers selected from, the molecular weight of the resulting ethylene / .alpha.-olefin copolymer it is assumed to be high. [0079] 　Olefin polymerization catalyst comprising the bridged metallocene compound (A), in the case of copolymerizing ethylene, having 3 or more α- olefins carbon in its presence, are also correlated features by high hydrogen response. In other words, with a small amount of hydrogen introduced into the polymerization reactor, the performance of the molecular weight of the resulting ethylene / α- olefin copolymer is greatly reduced. Such performance is defined by the molecular weight ratio of ethylene / .alpha.-olefin copolymer produced respectively hydrogenation during polymerization and hydrogen not added when polymerizing. Means the reduction of hydrogenation at the time of polymerization the molecular weight as when the molecular weight ratio is small is large, which is possible be regarded as high hydrogen response of the polymerization catalyst I following. Here, molecular weight ratio can also be replaced by the ratio of the intrinsic viscosity becomes a substitute index ([η]) and melt flow rate (MFR). [0080] 　The applicant, a result of intensive studies for various bridged metallocene compounds, the above general formula [I] bridged metallocene compound represented by the (the A), R . 13 and R 14 at least one, in particular the substitution of Hammett's rule when the substituent constant σ is -0.2 or less of the electron donating substituent has a one or more substituted with electron-donating group-containing substituted aryl groups, with ethylene in the presence of an olefin polymerization catalyst containing the crosslinked metallocene compound (a) when copolymerizing one or more monomers selected from the number 3 or more .alpha.-olefin, was found for the first time that the molecular weight of the ethylene / .alpha.-olefin copolymer produced with a small amount of hydrogen introduction amount greatly reduced . [0081] 　In the coordination polymerization of olefins by organic metal complex catalyst such as bridged metallocene compound (the A), the polymer molecular chain of the central metal of the catalyst is dissociated by reaction with hydrogen, propagation reaction of the molecule chains is stopped it is known. When comparing the frequency where frequency and propagation reaction of the reaction with hydrogen, can be considered to have a high responsiveness to hydrogen the greater the the ratio. When following the above estimate the frequency of each reaction from the activation energy of each reaction, the value obtained by subtracting the activation energy of propagation reaction from the activation energy of the reaction with hydrogen (hereinafter,? E H ) is positive, the frequency of reaction to hydrogen as compared to the frequency of smaller this value growth reaction is high, that is estimated to show a high hydrogen response. [0082] 　In the above general formula [I] bridged metallocene compound represented by (the A), R . 13 and R 14 contains at least one, in particular Hammett's rule substituent constant σ is -0.2 or less of the electron-donating substituent If it is an electron donating group-containing substituted aryl group, said? E H is decreased, the bridged metallocene compound one selected from olefin polymerization in the presence of a catalyst ethylene with carbon number of 3 or more α- olefins containing (a) when copolymerizing the above monomers, it is presumed that the molecular weight of the ethylene / .alpha.-olefin copolymer produced with a small amount of hydrogen introduced amount decreases greatly. [0083] 　The above general formula [I] bridged metallocene compound represented by the (the A), R 1 , R 2 , R 3 and R 4 are preferably are all hydrogen. Such bridged metallocene compound (A-1) is represented by the following general formula [V]. [0084] [化5] （式［V］において、Ｙ、Ｍ、Ｒ5、Ｒ6、Ｒ7、Ｒ8、Ｒ9、Ｒ10、Ｒ11、Ｒ12、Ｒ13、Ｒ14、Ｑおよびｊの定義等は、上述のとおりである。） [0085] 　The crosslinked metallocene compound (A-1) is, R in the general formula [the I] 1 , R 2 , R 3 and R 4 compared to the compound from which one or more or is substituted with a substituent other than hydrogen atom, manufacturing process is simplified, reduced manufacturing costs, an advantage that the manufacturing cost of the ethylene / .alpha.-olefin copolymer is reduced can be obtained by using thus the crosslinked metallocene compound. Furthermore, when copolymerized with one or more monomers selected from olefin polymerization in the presence of a catalyst ethylene with carbon number of 3 or more α- olefins containing crosslinked metallocene compound (A-1), the improvement of polymerization activity and advantage of molecular weight increase of the resulting ethylene / α- olefin copolymer can also be obtained. Furthermore, the advantage is also obtained that the improvement of the α- olefin copolymer of (reactivity of α- olefin to ethylene). [0086] 　The above general formula [V] bridged metallocene compound represented by the (A-1), Y is more preferably a carbon atom. Such bridged metallocene compound (A-2) is represented by the following general formula [VI]. [0087] [化6] （式［VI］において、Ｍ、Ｒ5、Ｒ6、Ｒ7、Ｒ8、Ｒ9、Ｒ10、Ｒ11、Ｒ12、Ｒ13、Ｒ14、Ｑおよびｊの定義等は、上述のとおりである。） 　該架橋メタロセン化合物（Ａ－２）は、例えば下式［VII］のような簡便な方法で合成することが可能である。 [0088] [Formula 7] In (formula [VII], M, R 5 of 5 , R . 6 , R 7 , R . 8 , R . 9 , R 10 , R . 11 , R . 12 , R . 13 and R 14 defined etc., as described above in is.) [0089] 　In the above formula [VII], R . 13 and R 14 at least one of an electron donating group-containing substituted aryl group (i.e., substituent constant Hammett's rule σ is -0.2 or less of the electron-donating substituent of one or more substituted hydrocarbon group of each of the electron-donating substituent when electron-donating substituents are plural substituents may be the same or different, from 1 carbon atoms in addition to the electron-donating substituent 20 , a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, may be substituents selected from halogen atoms and halogen-containing groups are substituted, each substituent when the substituent is a plurality replaced at the same Although it is also be substituted aryl groups) which differ by the general formula R . 13 -C (= O) -R 14 represented by satisfying such conditions various ketone, commercially available from general reagents manufacturer since there is a readily available raw material of the crosslinked metallocene compound (a-2). Furthermore, Even if such ketones are not commercially available, for example, the method according to Olah et al [Heterocycles, 40, 79 (1995 )] or the like, the ketones can be easily synthesized. Thus, the cross-linking metallocene compound (A-2), Y is a silicon atom in the above general formula [V], and the manufacturing process is the simple and easy compared with the compound selected from germanium atoms and tin atoms, the manufacturing cost is further reduced, an advantage that the production cost of ethylene / .alpha.-olefin copolymer is reduced can be obtained by using thus the crosslinked metallocene compound. Furthermore, when copolymerized with one or more monomers selected from olefin polymerization in the presence of a catalyst ethylene with carbon number of 3 or more α- olefins containing crosslinked metallocene compound (A-2), further improvement of polymerization activity and also the advantage that further molecular weight increase of the resulting ethylene / α- olefin copolymer. In addition, also the advantage that further improvement of α- olefin copolymer of (reactivity of α- olefin to ethylene). [0090] 　The above general formula [VI] bridged metallocene compound represented by the (the A-2), R . 13 and R 14 an electron-donating substituent groups contained in the to be a group selected from a nitrogen-containing group and an oxygen-containing group A further preferred. These substituents σ in Hammett rule is particularly low, of the object of the present invention is to provide, exerts significant effect on the resolution of inter alia (1) and (2). [0091] 　The above general formula [VI] bridged metallocene compound represented by the (the A-2), R . 13 and R 14 are the same, including a group selected from a nitrogen-containing group and an oxygen-containing group as the electron-donating substituent and more preferably a substituted aryl group. Accordingly synthesis process is simplified and is reduced further the production cost, the advantage that the production cost of ethylene / .alpha.-olefin copolymer is reduced can be obtained by using thus the crosslinked metallocene compound. [0092] 　The above general formula [VI] bridged metallocene compound represented by the (the A-2), R . 13 and R 14 are the same, including a group selected from a nitrogen-containing group and an oxygen-containing group as the electron-donating substituent it is more preferably a substituted phenyl group. For example, when synthesized according to the method as described above formula [VII], availability of raw materials becomes easy for various benzophenone as a raw material is commercially available from General reagents manufacturer, the manufacturing process is simplified, further manufacturing costs is reduced, an advantage that the manufacturing cost of the ethylene / .alpha.-olefin copolymer is reduced can be obtained by using thus the crosslinked metallocene compound. [0093] 　Examples of the substituted phenyl group containing a group selected from a nitrogen-containing group and an oxygen-containing group as the electron-donating substituent, o- aminophenyl group (2-aminophenyl group), p-aminophenyl group (4 - aminophenyl group), o-(dimethylamino) phenyl group (2- (dimethylamino) phenyl group), p-(dimethylamino) phenyl group (4- (dimethylamino) phenyl group), o-(diethylamino) phenyl group (2- (diethylamino) phenyl group), p- (diethylamino) phenyl group (4- (diethylamino) phenyl group), m- (diethylamino) phenyl group (3- (diethylamino) phenyl group), o- methoxy phenyl group (2-methoxyphenyl group), p-methoxyphenyl group (4-methoxyphenyl group), o-ethoxyphenyl group (2-ethoxyphenyl group), p-ethoxyphenyl group (4-ethoxyphenyl group), ON- Morpho Rinirufeniru group (2-N- Morpho Li sulfonyl phenyl group), pN- Morpho Li sulfonyl phenyl group (4-N- Morpho Li sulfonyl phenyl group), mN- Morpho Li sulfonyl phenyl group (3-N- morpholinyl phenyl group), o, p- dimethoxyphenyl group (2,4-dimethoxyphenyl group), m, p- dimethoxyphenyl group (3,4-dimethoxyphenyl group), p-(dimethylamino)-m-methoxyphenyl group (4- (dimethylamino) -3-methoxyphenyl), p-(dimethylamino)-m-methylphenyl group (4- (dimethylamino) -3-methylphenyl group), p-methoxyphenyl-m-methylphenyl group (4-methoxy-3-methylphenyl group), p-methoxy -m, m-dimethylphenyl group (4-methoxy-3,5-dimethylphenyl group), and the like. [0094] 　The above general formula [VI] bridged metallocene compound represented by the (the A-2), R . 13 and R 14 are, the electron donating substituent on the meta and / or para position on the binding of carbon atoms as said Y and more preferably the same substituted phenyl group containing a group selected from a nitrogen-containing group and an oxygen-containing groups as groups. For example, when synthesized according to the method as described above formula [VII], base synthesis becomes easier than in the case of substituting the ortho position, the manufacturing process is simplified, reduced further the production cost, and thus the crosslinked metallocene advantage compound production cost of ethylene / .alpha.-olefin copolymer by using a is reduced can be obtained. [0095] 　The above general formula [VI] bridged metallocene compound represented by the (the A-2), R . 13 and R 14 are, the electron donating substituent on the meta and / or para position on the binding of carbon atoms as said Y If the same substituted phenyl group containing a nitrogen-containing group as group, and more preferably nitrogen-containing group is a group represented by the following general formula [II]. [0096] [Formula 8] in (formula [II], R 15 and R 16 are a hydrogen atom, a hydrocarbon group, a silicon-containing group, atom or a substituent selected from an oxygen-containing groups and halogen-containing group having 1 to 20 carbon atoms each may be the same or different, may form a ring bonded to each other, right drawn lines N represents a bond with the phenyl group.) 　R 15 and R 16 carbon atoms as a 1 from 20 of the hydrocarbon group, a silicon-containing group, as the oxygen-containing group, and a halogen-containing groups can be specific examples of these substituents as described above. [0097] 　Such bridged metallocene compound (A-3) is represented by the following general formula [VIII]. [0098] [Formula 9] In (formula [VIII], M, R 5 of 5 , R . 6 , R . 7 , R . 8 , R 9 , R 10 , R . 11 , R . 12 , defined like the Q and j are as defined above. R 15 , R 16 and R 22 is a hydrogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, atom or a substituent selected from a halogen atom and a halogen-containing group, each may be the same or different, R 5 of 5 from R 22 adjacent substituents of up may also be bonded to each other to form a ring, NR 15 R 16 substituent constant Hammett's rule σ is -0.2 or less of a nitrogen-containing group, each nitrogen-containing group in the case of nitrogen-containing groups are present a plurality may be the same or different, n is an integer from 1 3, yd is 0 to 4 it is an integer.) [0099] 　The crosslinked metallocene compound (A-3) may, NR represented by the general formula [II] 15 R 16 for particularly low σ in Hammett's rule of, among the problems which the present invention is to provide, inter alia (1) and exert a more significant effect on the solution of (2). [0100] 　The above general formula [VI] bridged metallocene compound represented by the (the A-2), R . 13 and R 14 are, the electron donating substituent on the meta and / or para position on the binding of carbon atoms as said Y If the same substituted phenyl group containing an oxygen-containing groups as groups, and more preferably oxygen-containing group is a group represented by the following general formula [III]. [0101] [Formula 10] in (formula [III], R . 17 is a hydrogen atom, atom or a substituent group selected from a hydrocarbon group, a silicon-containing group, nitrogen-containing groups and halogen-containing groups having 1 to 20 carbon atoms, the O line drawn right represents a bond with a phenyl group.) 　R . 17 hydrocarbon group of a carbon number of 1 as 20, a silicon-containing group, a nitrogen-containing group and halogen-containing groups, the substituent groups described above it is a specific example of that. [0102] 　Such bridged metallocene compound (A-4) is expressed by the following general formula [IX]. [0103] [Chem 11] in (formula [IX], M, R 5 of 5 , R . 6 , R . 7 , R . 8 , R . 9 , R 10 , R 11 , R . 12 , defined like the Q and j are as defined above. R . 17 and R 22 are a hydrogen atom, a hydrocarbon group, a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, atom or a substituent selected from a halogen atom and a halogen-containing group having 1 to 20 carbon atoms, in each same may be different, R 5 of 5 from R 22 adjacent substituents of up may also be bonded to each other to form a ring, OR . 17 substituent constant Hammett's rule σ is -0.2 or less of oxygen-containing groups There, each of the oxygen-containing group in the case where the oxygen-containing groups are present a plurality may be the same or different, n is an integer from 1 3, yd is an integer from 0 to 4.) [0104] 　The crosslinked metallocene compound (A-4) is, OR represented by the general formula [III] . 17 for even lower σ in Hammett's rule of, among the problems which the present invention is to provide, inter alia (1) and ( exert a more significant effect on the resolution of 2). [0105] 　The general formula [VIII] bridged metallocene compound represented by (A-3) or cross-linked metallocene compound represented by the general formula [IX] in the (A-4), each of R 5 of 5 , R . 8 , R . 9 and R . 12 and more preferably are all hydrogen atoms. Such bridged metallocene compound (A-5) or (A-6) are represented respectively by the following general formula [X] or [XI]. [0106] [Formula 12] (formula in [X-], M, R . 6 , R . 7 , R 10 , R . 11 , defined like the Q and j are as described above .R 15 , R 16 and R 22 are a hydrogen atom, hydrocarbon group having from 1 to 20 carbon atoms, a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, an atom or a substituent selected from a halogen atom and a halogen-containing group, each may be the same or different, R . 6 from R 22 adjacent substituents of up may be bonded to each other to form a ring, NR 15 R 16 is a substituent constant σ is -0.2 or less of nitrogen-containing groups of the Hammett's rule, the nitrogen-containing groups each of the nitrogen-containing group in the case where there exist a plurality may be the same or different, n is an integer from 1 3, m is an integer from 0 to 4.) [0107] [Formula 13] in the (formula [XI], M, R . 6 , R . 7 , R 10 , R . 11 , defined like the Q and j are as defined above .R . 17 and R 22 are a hydrogen atom, a carbon number 1 from 20 hydrocarbon group, a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, an atom or a substituent selected from a halogen atom and a halogen-containing group, each may be the same or different, R . 6 from R 22 to adjacent substituents may form a ring bonded to each other, OR . 17 is a substituent constant σ is -0.2 or less of oxygen-containing groups of the Hammett's rule, if the oxygen-containing groups are present a plurality in may be the same or different is each an oxygen-containing group, n is an integer from 1 3, m is an integer from 0 to 4.) [0108] 　The crosslinked metallocene compound (A-5) or (A-6), when synthesized according to the method such as, for example, the formula [VII], R in the general formula [VIII] or [IX] 5 of 5 , R . 8 , R 9 and R . 12 compared to the compound from which any one or more are substituted with a substituent or a halogen atom other than a hydrogen atom, synthetic becomes easy, the manufacturing process is simplified, reduced further the production cost, and thus the crosslinked advantage that the cost of manufacturing it in the ethylene / α- olefin copolymer using a metallocene compound is reduced can be obtained. [0109] 　The above general formula bridged metallocene compound represented by [X] (A-5) or the general formula [XI] bridged metallocene compound represented by the (A-6), each of R . 6 , R . 7 , R 10 and R . 11 , at least two of the hydrocarbon groups having 1 to 20 carbon atoms of the silicon-containing group, a nitrogen-containing group, an oxygen-containing group, and more preferably an atom or a substituent selected from a halogen atom and a halogen-containing group. If copolymerizing one or more monomers selected from the olefin polymerization in the presence of a catalyst ethylene with carbon number of 3 or more .alpha.-olefins containing crosslinked metallocene compounds, ethylene is further improved and the production of polymerization activity / .alpha. advantage of further molecular weight increase of the olefin copolymer is obtained. [0110] 　The above general formula bridged metallocene compound represented by [X] (A-5) or the general formula [XI] bridged metallocene compound represented by the (the A-. 6), R . 6 and R . 7 and a, and / or R 10 and R 11 it is more preferable that the are bonded to each other to form a ring. If copolymerizing one or more monomers selected from the olefin polymerization in the presence of a catalyst ethylene with carbon number of 3 or more .alpha.-olefins containing crosslinked metallocene compounds, ethylene is further improved and the production of polymerization activity / .alpha. advantage of further molecular weight increase of the olefin copolymer is obtained. In addition, also the advantage that further improvement of α- olefin copolymer of (reactivity of α- olefin to ethylene). [0111] 　The above general formula bridged metallocene compound represented by [X] (A-5) or the general formula [XI] bridged metallocene compound represented by the (the A-. 6), R . 6 and R . 7 and a, and R 10 R and 11 it is further preferable that the are bonded to each other to form a ring. The crosslinked metallocene compound, bridged metallocene compounds of the present invention represented by the aforementioned general formula [X] (A-5) or cross-linked metallocene compounds of the present invention represented by the aforementioned general formula [XI] in the (A-6) , R . 6 and R . 7 combinations with or R, 10 and R . 11 compared to the case where only one combination of are joined to form a ring, synthetic becomes easy, the manufacturing process is simplified, further production cost is reduced, an advantage that the manufacturing cost of the ethylene / .alpha.-olefin copolymer is reduced can be obtained by using thus the crosslinked metallocene compound. [0112] 　The above general formula bridged metallocene compound represented by [X] (A-5) or the general formula [XI] bridged metallocene compound represented by the (the A-. 6), R . 6 and R . 7 and a, and R 10 and R . 11 ring five to seven-membered ring and is formed by bonding, and more preferably especially six-membered ring. The crosslinked metallocene compound, the above-mentioned general formula [X] bridged metallocene compound represented by (A-5) or cross-linked metallocene compound represented by the general formula [XI] in (the A-. 6), R . 6 and R . 7 DOO is and R 10 and R . 11 ring and formed by bonding as compared to the case where five or non seven-membered rings, the synthesis is facilitated, the manufacturing process is simplified, further manufacturing costs reduced is the advantage that the manufacturing cost of the ethylene / .alpha.-olefin copolymer is reduced can be obtained by using thus the crosslinked metallocene compound. [0113] 　The general formula [X] bridged metallocene compound represented by (A-5) or cross-linked metallocene compound represented by the general formula [XI] (A-6) is represented by the following general formula [IV] crosslinking and more preferably a metallocene compound (a-7). [0114] [Formula 14] in the (formula [IV], M is titanium atom, zirconium atom or hafnium atom, R . 13 and R 14 are among the drawn-substituted phenyl group in the above general formula [X-], nitrogen substituted phenyl groups containing containing groups in meta and / or para position on the binding of Y, and out of the drawn-substituted phenyl group in the above general formula [XI], meta an oxygen-containing groups on the binding of Y selected position and / or substituted phenyl group containing the para position, R 18 , R . 19 , R 20 , and R 21 is a hydrogen atom or a methyl group, Q is a hydrocarbon group of a halogen atom, from 1 to 20 carbon atoms are selected in the same or different combination from a neutral ligand capable of coordination with an anionic ligand and a lone pair, j is an integer of 1 to 4.) [0115] 　The crosslinked metallocene compound when copolymerized with one or more monomers selected from ethylene and having 3 or more α- olefins carbon in the presence of an olefin polymerization catalyst comprising (A-7), further improvement and production of polymerization activity advantage of further molecular weight increase of the ethylene / α- olefin copolymer is obtained. In addition, also the advantage that further improvement of α- olefin copolymer of (reactivity of α- olefin to ethylene). [0116] 　The above general formula [I] bridged metallocene compound represented by (A), the general formula [V] bridged metallocene compound represented by (A-1), bridged metallocene compound represented by the general formula [VI] ( A-2), the general formula [VIII] bridged metallocene compound represented by (A-3), the general formula [IX] bridged metallocene compound represented by (A-4), the general formula in [X] bridged metallocene compound represented (A-5), the general formula [XI] bridged metallocene compound represented by (A-6) or the general formula [IV] bridged metallocene compound represented by the (A-7) , and more preferably M is a hafnium atom. If M is copolymerized with one or more monomers selected from the crosslinking in the presence of an olefin polymerization catalyst comprising a metallocene compound of ethylene with C 3 or more α- olefins hafnium atom, ethylene / alpha generating particularly - molecular weight of the olefin copolymer, and copolymerization of α- olefin (reactive α- olefin to ethylene) are obtained advantage of dramatically improved. [0117] 　(Illustrated like bridged metallocene compound (A)) 　Examples of the bridged metallocene compound (the A), 　[bis [4- (dimethylamino) phenyl] methylene (.eta 5 of 5 - cyclopentadienyl) (.eta 5 of 5 - fluorenyl) ] hafnium dichloride, [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl fluorenyl) hafnium dichloride, [bis [4- (dimethylamino ) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 -3,6-dimethyl fluorenyl) hafnium dichloride, [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl ) (eta 5 -2,7-di -t- butylfluorenyl)] hafnium dichloride, [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 -3,6 - di -t- butyl fluorenyl) hafnium dichloride, [bis [4- (dimethylamino) phenyl] methylene (.eta 5 of 5 - cyclopentadienyl) (.eta 5 of 5 -2,3,6,7-tetramethyl-full Oreniru)] hafnium dichloride, [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl-3,6-di -t- butylfluorenyl )] hafnium dichloride, [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 - tetramethyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride, 　[bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) ( eta 5 - fluorenyl)] hafnium dichloride, [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl fluorenyl) hafnium dichloride, [bis (4-methoxy phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -3,6-dimethyl fluorenyl) hafnium dichloride, [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 2,7-di -t- butylfluorenyl)] hafnium dichloride, [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -3,6-di -t- Buchirufuru Oreniru)] hafnium dichloride, [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,3,6,7- tetramethyl fluorenyl) hafnium dichloride, [bis ( 4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl-3,6-di -t- butylfluorenyl)] hafnium dichloride, [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - tetramethyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octa methyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, 　[bis (4-t- butyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - fluorenyl)] hafnium dichloride, [bis (4-t- butyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl fluorenyl) hafnium dichloride, [bis (4-t- butyl phenyl) methylene (eta 5 - cyclopentadienyl) ( eta 5 -3,6-dimethyl fluorenyl) hafnium dichloride, [bis (4-t- butyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-di -t- Buchirufuru Oreniru)] hafnium dichloride, [bis (4-t- butyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -3,6-di -t- butylfluorenyl)] hafnium dichloride, [bis (4-t-butylphenyl) methylene (.eta 5 of 5 - cyclopentadienyl) (.eta 5 of 5 -2,3,6,7-tetramethyl-fluorenyl)] hafnium dichloride, [bis (4-t-butylphenyl) methylene (.eta 5 of 5 - cyclopentadienyl) (.eta 5 of 5 -2,7-dimethyl-3,6-di -t- butyl-fluorenyl)] hafnium dichloride, [bis (4-t-butylphenyl) methylene (.eta 5 - cyclopentadienyl) (eta 5 - tetramethyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, [bis (4-t- butyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, 　[bis (3-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - fluorenyl)] hafnium dichloride, [bis (3-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl fluorenyl) hafnium dichloride, [bis (3-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclo pentadienyl) (eta 5 -3,6-dimethyl fluorenyl) hafnium dichloride, [bis (3-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7 - di -t- butylfluorenyl)] hafnium dichloride, [bis (3-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -3,6-di -t- Buchirufuru Oreniru)] hafnium dichloride, [bis (3-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,3,6,7- tetramethyl fluorenyl)] hafnium dichloride , [bis (3-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl-3,6-di -t- butylfluorenyl)] hafnium dichloride, [bis (3-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - tetramethyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, [bis (3-N- Morpho Li sulfonyl phenyl ) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride, 　[bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - fluorenyl)] hafnium dichloride, [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl fluorenyl) hafnium dichloride, [ bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -3,6-dimethyl fluorenyl) hafnium dichloride, [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-di -t- butylfluorenyl)] hafnium dichloride, [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopenta dienyl) (eta 5 -3,6-di -t- butylfluorenyl)] hafnium dichloride, [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - 2,3,6,7-tetra-methyl fluorenyl) hafnium dichloride, [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl - 3,6-di -t- butylfluorenyl)] hafnium dichloride, [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - tetramethyl octahydrofluorenyl dibenzo fluorenylmethoxy sulfonyl)] hafnium dichloride, [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride, 　[bis (4- methoxy-3-methyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - fluorenyl)] hafnium dichloride, [bis (4-methoxy-3-methyl-phenyl) methylene (eta 5 - cyclopentadienyl) ( eta 5 -2,7-dimethyl fluorenyl) hafnium dichloride, [bis (4-methoxy-3-methyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -3,6-dimethyl-fluorenylmethoxy )] hafnium dichloride, [bis (4-methoxy-3-methyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-di -t- butylfluorenyl)] hafnium dichloride, [bis (4-methoxy-3-methylphenyl) methylene (.eta 5 of 5 - cyclopentadienyl) (.eta 5 of 5 -3,6-di -t- butyl-fluorenyl)] hafnium dichloride, [bis (4-methoxy-3- methyl phenyl) methylene (η 5 - cyclopentadienyl) (η 5 -2,3,6,7- tetramethyl fluorenyl) hafnium dichloride, [bis (4-methoxy-3-methyl-phenyl) methylene (η 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl-3,6-di -t- butylfluorenyl)] hafnium dichloride, [bis (4-methoxy-3-methyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - tetramethyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, [bis (4-methoxy-3-methyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octa methyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, 　[bis (3,4-dimethoxyphenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - fluorenyl)] hafnium dichloride, [bis (3,4-dimethoxy phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl fluorenyl) hafnium dichloride, [bis (3,4-dimethoxyphenyl) methylene (eta 5 - cyclopentadienyl) ( eta 5 -3,6-dimethyl fluorenyl) hafnium dichloride, [bis (3,4-dimethoxyphenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-di -t- Buchirufuru Oreniru)] hafnium dichloride, [bis (3,4-dimethoxyphenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -3,6-di -t- butylfluorenyl)] hafnium dichloride, [bis (3,4-dimethoxyphenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,3,6,7- tetramethyl fluorenyl) hafnium dichloride, [bis (3,4-dimethoxyphenyl) methylene (η 5 - cyclopentadienyl) (η 5 -2,7-dimethyl-3,6-di -t- butylfluorenyl)] hafnium dichloride, [bis (3,4-dimethoxyphenyl) methylene (η 5 - cyclopentadienyl) (eta 5 - tetramethyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, [bis (3,4-dimethoxyphenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, 　[bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - fluorenyl)] hafnium dichloride, [bis (4- methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl fluorenyl) hafnium dichloride, [bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -3,6-dimethyl fluorenyl) hafnium dichloride, [bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl ) (eta 5 -2,7-di -t- butylfluorenyl)] hafnium dichloride, [bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - 3,6-di -t- butylfluorenyl)] hafnium dichloride, [bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,3,6 , 7-tetra-methyl fluorenyl) hafnium dichloride, [bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl-3,6 - di -t- butylfluorenyl)] hafnium dichloride, [bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - tetramethyl octahydrofluorenyl dibenzo butylfluorenyl )] hafnium dichloride, [bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride, and 　these compounds compound was replaced by hafnium atoms in zirconium atom or compounds chloro ligand was replaced by a methyl group the like are exemplified, the bridged metallocene compound (a) is not limited to these examples. But if you mention a dare preferred group of compounds, [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride , [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride, [bis (3-N- Morpho Li sulfonyl phenyl ) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride, [bis (4-methoxy-3-methyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride, [bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyl octahydropentalene dibenzo fluorenyl)] hafnium dichloride, [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride, [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 - tetramethyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) ( eta 5 - tetramethyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride, [bis (3,4-dimethoxyphenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl-3,6 di -t- butylfluorenyl)] hafnium dichloride, [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl-3,6-di -t- butyl fluorenyl)] hafnium dichloride, [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,3,6,7- tetramethyl fluorenyl) hafnium dichloride, [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-di -t- butylfluorenyl)] hafnium dichloride, [bis (3,4-dimethoxyphenyl ) methylene (eta 5 - cyclopentadienyl) (eta 5 -2,7-dimethyl fluorenyl) hafnium dichloride, [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - 2,7-dimethyl fluorenyl) hafnium dichloride, [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 -3,6-di -t- butylfluorenyl )] hafnium dichloride, and [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] zirconium dichloride, and the like. [0118] 　It should be noted, illustrated η is a structural part of the cross-linked metallocene compound (A) 5 - tetramethyl octahydrofluorenyl dibenzo butylfluorenyl is 4,4,7,7- tetramethyl - (5a, 5b, 11a, 12,12a-η 5 ) -1,2,3,4,7,8,9,10- octahydro-dibenzo [b, h] fluorenyl group, eta 5 - octamethyloctahydrodibenzofluorenyl is 1,1,4,4, 7,7,10,10- octamethyl - (5A, 5B, 11A, 12, 12a-eta 5 ) -1,2,3,4,7,8,9,10- octahydro-dibenzo [b, h] fluorenyl It represents the basis of each. Than this, for example [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 - tetramethyl octahydrofluorenyl dibenzo fluorenyl) hafnium dichloride is represented by the following formula [XII], [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride will be representing respectively the structure of the following formula [XIII]. This is defined in the same manner even in the following description of the present invention. [0119] [Of 15] [0120] [Formula 16] 　 　The polymerization catalyst used in the present invention is characterized in that it includes the above bridged metallocene compound (A), furthermore, the aforementioned bridged metallocene compound (the A), and organometallic compounds (B-1), the organoaluminum oxy-compound (B-2) and bridged metallocene compounds compound which reacts with (a) to form an ion pair, at least one compound selected from (B-3) (B ) it is characterized in that it comprises. [0121] 　Organometallic compounds as (B-1), the periodic table Group 1, 2 and 12, 13 Group organometallic compounds such as the following are used in particular. 　(B-1a) formula R a yd Al (OR b ) n H p- X- q- in (formula, R a and R b , which may be the same or different from each other, from 1 to 15 carbon atoms, preferably from 1 shows a 4 hydrocarbon group, X is a halogen atom, m is 0 　In the present invention, as a component of an olefin polymerization catalyst, may be used carrier (C) optionally. [0150] 　Carriers that may be used in the present invention (C) is an inorganic or organic compound, a granular or particulate solid. Among these, as the inorganic compound, porous oxide, inorganic chlorides, clay, clay mineral or ion-exchange layered compound. [0151] 　As the porous oxide, specifically SiO 2 , Al 2 O 3 , MgO, ZrO, TiO 2 , Bs 2 O 3 , CaO, ZnO, BaO, ThO 2 , etc., or composites or mixtures containing them, for example, natural or synthetic zeolites, SiO 2 -MgO, SiO 2 -Al 2 O 3 , SiO 2 -TiO 2 , SiO 2 -V 2 O 5 of 5 , SiO 2 -Cr 2 O 3 , SiO 2 -TiO 2 using, for example -MgO can do. Of these, SiO 2 and / Al or 2 O 3 as a main component are preferred. Such porous oxides, its properties are different depending on the type and production process, the carrier preferably used in the present invention, the particle size is from 0.5 to 300 .mu.m, a preferably from 1.0 200 .mu.m, specific surface area 50 from yd 1000 2 / g, preferably from 700 yd 0.89 2 is in the range of / g, a pore volume of from 0.3 3.0 cm 3 is in the range of / g. Such carriers 100 from 1000 ° C. If necessary, preferably used after calcined at 700 ° C. 150. [0152] 　As the inorganic chlorides, MgCl 2 , MgBr 2 , MnCl 2 , MnBr 2 etc. are used. Inorganic chlorides may be used as it is, a ball mill, may be used after pulverized by a vibration mill. Further, after dissolving the inorganic chloride in a solvent such as an alcohol, it may be used in which precipitated in particulate form by precipitation agents. [0153] 　Clay is configured to normally clay minerals as main components. The ion-exchange layered compounds, such as by an ionic bond, a compound having a parallel stacked crystal structure plane formed each other weak bonding strength, ion contained is capable exchange. Most of clay minerals are ion-exchange layered compounds. These clays, clay minerals and the ion-exchange layered compounds, not limited to the naturally occurring, can also be used artificially synthesized product. In addition, the clay, as the clay mineral or ion-exchange layered compounds include clay, clay mineral also,, hexagonal close packing type, antimony type, CdCl 2 type, CdI 2 ion crystalline compounds having a layered crystal structure, such as type, etc. it can be exemplified. Such a clay, as the clay mineral, kaolin, bentonite, kibushi clay, gairome clay, allophane, hisingerite, pyrophyllite, mica group, montmorillonite group, vermiculite, chlorite group, palygorskite, kaolinite, nacrite, dickite , and the like halloysite, as the ion-exchange layered compounds, alpha-Zr (HAsO 4 ) 2 · H 2 O, alpha-Zr (HPO 4 ) 2 , alpha-Zr (KPO 4 ) 2 · 3H 2 O, alpha-Ti (HPO 4 ) 2 , alpha-Ti (HAsO 4 ) 2 · H 2 O, alpha-Sn (HPO 4 ) 2 · H 2 O, gamma-Zr (HPO 4 ) 2 , gamma-Ti (HPO 4 ) 2 , gamma-Ti (NH 4 PO 4 ) 2 · H 2 such as polyvalent metal crystalline acid salts of such O and the like. Clays used in the present invention, the clay mineral is also preferably subjected to chemical treatment. As the chemical treatment, surface treatment for removing impurities attached to the surface, such as treatment affecting the crystal structure of the clay, either can be used. As the chemical treatment, in particular, acid treatment, alkali treatment, salt treatment and organic substance treatment. [0154] 　Ion-exchange layered compounds using ion exchange, by exchanging exchangeable ions between layers with other larger bulky ions, may be a layered compound in a state in which the interlayer has expanded. Such bulky ions, plays a pillar-like roll to support the layer structure, commonly referred to as pillars. In addition, in this way to the introduction of another substance (guest compound) between the layers of the layered compound called intercalation. As the guest compound, TiCl 4 , ZrCl 4 cationic inorganic compounds, such as, Ti (OR) 4 , Zr (OR) 4 , PO (OR) 3 , Bs (OR) 3 such as a metal alkoxide (R is a hydrocarbon and a group), [Al 13 O 4 (OH) 24 ] 7Tasu , [Zr 4 (OH) 14 ] 2Tasu , [Fe 3 O (OCOCH 3 ) 6 ] Tasu and metal hydroxide ions such as . These compounds are used singly or in combination of two or more. In addition, when the intercalation of these compounds, Si (OR) 4 , Al (OR) 3 , Ge (OR) 4 (the R hydrocarbon group, etc.) metal alkoxides such as such as the hydrolysis polycondensation obtained polymer, SiO 2 may be present together and colloidal inorganic compounds such as. Examples of the pillars include oxides produced by heating dehydration after intercalation of the above-mentioned metallic hydroxide ions between layers. Among these, preferred are clay and clay minerals, particularly preferable are montmorillonite, vermiculite, pectolite, taeniolite and synthetic mica. [0155] 　As the organic compound serving as a carrier (C), particle size can be mentioned granular or particulate solid is in the range of 0.5 to 300 .mu.m. Specifically, ethylene, propylene, 1-butene, 4-methyl-1 number of carbon atoms such as pentene is produced as a main component α- olefin of 2 to 14 (co) polymer or vinyl cyclohexane, styrene the produced as a main component (co) polymers, and can be exemplified those modified product. [0156] 　 　method of manufacturing an ethylene / .alpha.-olefin copolymer of the present invention, in the presence of the above olefin polymerization catalyst, ethylene and carbon atoms 3 It is characterized by copolymerizing or more α- olefins. [0157] 　The α- olefin used in the present invention, propylene, 1-butene, 1-pentene, 3-methyl-1-butene, 1-hexene, 4-methyl-1-pentene, 3-methyl-1-pentene, 1 - octene, 1-decene, 1-dodecene, 1-tetradecene, 1-hexadecene, 1-octadecene, exemplified 1-eicosene, a linear or branched α- olefins having a carbon number of 3 to 20 such as vinyl cyclohexane be able to. The α- olefin is preferably a linear or branched α- olefins having 3 to 10 carbon atoms, propylene, 1-butene, 1-hexene and 1-octene and more preferably. These α- olefins may be used singly or as combinations of two or more. [0158] 　It is also possible to proceed polar group-containing monomer, an aromatic vinyl compound, and the polymerization allowed to coexist in the reaction system at least one member selected from cyclic olefin. Per 100 parts by weight of ethylene and carbon atoms and 3 or more α- olefins, other monomers, for example, 20 parts by weight or less, preferably in an amount of 10 parts by mass or less. [0159] 　As the polar group-containing monomer, acrylic acid, methacrylic acid, fumaric acid, alpha such as anhydrous maleic acid, .beta.-unsaturated carboxylic acids, and metal salts such as their sodium salts, methyl acrylate, ethyl acrylate, n- propyl, methyl methacrylate, alpha, such as ethyl methacrylate, .beta.-unsaturated carboxylic acid esters, vinyl acetate, vinyl esters such as vinyl propionate, glycidyl acrylate, and unsaturated glycidyl such as glycidyl methacrylate it can be exemplified. [0160] 　The aromatic vinyl compounds include styrene, o- methyl styrene, m- methyl styrene, p- methyl styrene, o, p- dimethylstyrene, methoxystyrene, vinyl benzoate, vinyl benzoate, vinyl benzyl acetate, hydroxystyrene, p- chlorostyrene, divinylbenzene, .alpha.-methyl styrene, and the like can be exemplified allyl benzene. [0161] 　The cyclic olefin, cyclopentene, cycloheptene, norbornene, 5-methyl-2-norbornene, tetracyclododecene carbon number of 3 to 30, such as, preferably can be exemplified cyclic olefins having 3 to 20. [0162] 　As a method for producing the ethylene / .alpha.-olefin copolymer of the present invention, in the presence of the above olefin polymerization catalyst, a method of ethylene and carbon atoms copolymerized with 3 or more .alpha.-olefin, the polymer each of the total amount of the structural unit derived from a monomer is 100 mole%, the proportion of the structural unit derived from ethylene is polymerized as ethylene / .alpha.-olefin copolymer is at least 50 mol% is obtained method, and the like. [0163] 　Ethylene, when copolymerized with one olefin selected from 20 .alpha.-olefin from 3 carbon atoms, molar ratio from ethylene and C 3 20 .alpha.-olefin, usually ethylene: .alpha. olefin = 10:90 99.9: 0.1, preferably ethylene: α- olefin = 30:70 to 99.9: 0.1, more preferably ethylene: from α- olefin = 50:50 99.9: 0.1. [0164] 　The polymerization method of using a product capable of olefin polymerization catalysts of ethylene / .alpha.-olefin copolymers of high molecular weight is a problem (1) of the present invention enables high-temperature polymerization. That is, by using said olefin polymerization catalyst, it is possible to keep the molecular weight of the ethylene / .alpha.-olefin copolymer produced during high-temperature polymerization at a desired high value. In solution polymerization, the viscosity of the polymerization solution containing the resulting ethylene / .alpha.-olefin copolymer is reduced at high temperature, increasing the concentration of the ethylene / .alpha.-olefin copolymer in the polymerization vessel as compared with the low temperature polymerization is possible, the polymerization vessel per productivity is improved as a result. Copolymerization of ethylene and α- olefin in the present invention, solution polymerization, suspension polymerization can be carried in any of (slurry polymerization) a liquid phase polymerization or gas phase polymerization method such as, in this way, the effect of the present invention solution polymerization in view of being able to maximize enjoy are particularly preferred. [0165] 　The method for using each of the components of the olefin polymerization catalyst, the order of addition is chosen arbitrarily. Also, at least two of the components in the catalyst may be contacted in advance. 　Bridged metallocene compound (A) (hereinafter referred to as "component (A)".) Is, per liter of the reaction volume, usually 10 -9 to 10 -1 mol, preferably 10 -8 to 10 -2 such that the molar used in an amount. [0166] 　Organometallic compounds (B-1) (hereinafter also referred to as "component (B-1)".), The components (B-1) and the molar ratio of the component (A) the transition metal atom in the (M) [( B-1) / M] 50000 usually 0.01, preferably used in an amount such that the 10000 0.05. [0167] 　The organoaluminum oxy-compound (B-2) (hereinafter referred to as "component (B-2)".) Is, aluminum atoms in the component (B-2), with component (A) the transition metal atom in the (M) the molar ratio of [(B-2) / M] is 5000 usually 10, used in such an amount that preferably of 2000 to 20. [0168] 　By reacting with the bridged metallocene compound (A) (hereinafter also referred to as "component (B-3)".) The compound to form an ion pair (B-3) is a component (B-3), in component (A) of the transition metal atom (M) molar ratio of [(B-3) / M] is 10000 usually 1, preferably used in an amount such that the 1 to 5000. [0169] 　The polymerization temperature is desirably maximum benefit possible high temperature effects of the present invention, a 300 ° C. usually 0.89 ° C., the lower limit temperature is preferably 120. ° C., is more preferably 130. ° C., the upper limit temperature is preferably 250 ° C. , more preferably 200 ° C.. As the temperature is higher in the 100 ℃ or more of the polymerization temperature range, solution viscosity is reduced at the time of polymerization, heat removal of the heat of polymerization also becomes easy, high molecular weight of the resulting ethylene / α- olefin copolymer can be achieved. However, it is not preferable because there is a case in which deterioration occurs in polymer polymerization temperature can be obtained with excessively more than 300 ℃. In addition, ethylene from the point of view the properties of the ethylene / α- olefin copolymer is preferably produced by olefin polymerization of the present invention, in the region of 200 ℃ the polymerization temperature is from 100 ℃, which is preferably used in the film and many other industries / it is possible to efficiently produce the α- olefin copolymer. [0170] 　The polymerization pressure is usually normal pressure ~ 10 MPa gauge pressure (MPa-G), preferably from normal pressure ~ 8 MPa-G. 　The polymerization reaction is batch, semi-continuous, it can be carried out by any of the methods of the continuous system. Furthermore, it is also possible to continuously carry out the polymerization in two or more polymerization vessel under different reaction conditions. [0171] 　The molecular weight of the resulting ethylene / .alpha.-olefin copolymer can be adjusted by changing the hydrogen concentration or polymerization temperature in the polymerization system. In addition, it can also be adjusted by the amount of component (B) to be used. If hydrogen is added, the amount is suitably 5000NL about from ethylene / α- olefin copolymer 1kg per 0.001 to produce. [0172] 　The polymerization solvent used in the liquid phase polymerization method, usually a inert hydrocarbon solvent, preferably a saturated hydrocarbon having a boiling point of 50 ℃ ~ 200 ℃ under normal pressure. As the polymerization solvent, specifically, propane, butane, pentane, hexane, heptane, octane, decane, dodecane and kerosine, cyclopentane, cyclohexane, and alicyclic hydrocarbons such as cyclopentane Among them, particularly preferred, hexane, heptane, octane, decane, cyclohexane. It may be used α- olefin itself which is the polymerization interest as a polymerization solvent. Incidentally, benzene, toluene, aromatic hydrocarbons, ethylene chloride, such as xylene, chlorobenzene, but also halogenated hydrocarbons such as dichloromethane may be used as a polymerization solvent, reduce the load on the environment viewpoint and to the human body health from the point of view of the minimization of influence, their use is not preferred. [0173] 　The density of the olefin polymer obtained by the olefin polymerization method of the present invention is usually 850 from kg 950 / yd 3 , preferably from 950 kg 860 / yd 3 is. 　The melt flow rate MFR of the olefin polymer obtained by the process olefin polymer of the present invention 2 (ASTM D-1238, 190 ° C., 2.16 kg load), 200 g / 10min usually 0.01, preferably from 0.05 100 g / 10min is there. MFR 2 When is within the range is preferred in terms of excellent moldability. [0174] 　Constituent units derived from ethylene of an ethylene / .alpha.-olefin copolymer obtained by the present invention is usually 99.9 50 mol%, preferably 99.9 to 65 mol% is more preferably 70 mol% from 99.7, the .alpha. olefin constituent unit derived from the 0.1 mol% from 50 mol%, preferably 0.1 mol% from 35 mol% is more preferably 0.3 mol% from 30 mol%. However, the sum of the constituent units and α- olefin-derived constituent units of the ethylene-derived and 100 mol%. [0175] 　In the ethylene / .alpha.-olefin copolymer obtained by the present invention, the vinyl of the molecular chain double bonds, vinylidene, respectively disubstituted olefins and trisubstituted olefins 1000 carbon per preferably less than 0.2, more preferably less than 0.1 . Each lower limit is 0 preferably 1000 per carbon. When the molecular chain double bond content is within the range, to suppress cleavage of the crosslinked and the polymer molecular chains during heat molding, variation and the MFR during molding, in addition to hardly occur desperation like, under heating conditions preferably possible to suppress deterioration such as when used in. Example [0176] 　Following is a more detailed explanation of the present invention based on examples, the present invention is not limited to these examples. 　Structure of bridged metallocene compounds and precursors thereof, 1 H NMR spectrum (270 MHz, JEOL GSH-270), FD- Mass measured (hereinafter FD-MS) spectrum (JEOL SX-102A), etc., was determined . [0177] 　[Bis (4-methylphenyl) methylene (.eta 5 of 5 - cyclopentadienyl) (.eta 5 of 5 - octamethyloctahydrodibenzofluorenyl) zirconium dichloride was synthesized according to the method described in WO2004 / 029062. 　Properties / Characteristics of the ethylene / .alpha.-olefin copolymer was measured by the following method. [0178] 　[1-octene content] 　Japan using a spectroscopic manufactured by Fourier transform infrared spectrophotometer FT / IR-610, 1376cm based on methyl symmetric deformation vibration of 1-octene -1 absorption in the vicinity of and overtone absorption of the CH stretching vibration 4325Cm -1 absorbance of the absorption in the vicinity of the measurement. Then these absorbance ratio (D1376cm -1 / D4325cm -1 ) is calculated and prepared in advance that had been calibration curve ( 13 C created using a standard sample orientation by NMR) 1- octene content by using the the (mol%) was obtained. 　[1-butene content] 　using the JASCO Corp. Fourier transform infrared spectrophotometer FT / IR-4100, CH based on the ethyl group of 1-butene 2 deformation vibration 771Cm -1 in the vicinity of the absorption and CH stretching vibration overtone absorption 4325Cm -1 absorbance of the absorption in the vicinity of the measurement. Then these absorbance ratio (D771cm -1 / D4325cm -1 calculates), a calibration curve (prepared in advance . 13 C NMR created using a standard sample orientation in) using 1-butene content the (mol%) was obtained. [0179] 　[Molecular chain double bond amount] 　O- dichlorobenzene -D 4 was used as a measurement solvent, measuring temperature of 120 ℃, spectral width 20ppm, pulse repetition time 7.0 seconds, pulse width 6.15Myusec (45 O in pulse) measurement conditions, 1 H NMR spectrum (400 MHz, JEOL ECX400P) was measured and calculated. [0180] 　[Intrinsic viscosity ([η])] 　using a decalin solvent, it was measured at 135 ℃. About 20 mg polymer was dissolved in decalin 15 ml, specific viscosity η at 135 ℃ in an oil bath sp was measured. After dilution by adding 5 of 5 ml decalin solvent to this decalin solution, the specific viscosity η in the same manner sp was measured. This dilution operation was repeated two more times, η when extrapolating the concentration (C) to 0 Sp the value of the / C was adopted as the intrinsic viscosity. 　　　[Eta] = lim (eta Sp / C) (C ￫ 0) [0181] 　[Melt flow rate (MFR 10 and MFR 2 )] 　MFR 10 : by standard methods of ASTM D-1238, 190 ℃, it is a numerical value measured under 5.0 from kg load. 　MFR 2 : by standard methods of ASTM D-1238, 190 ℃, a numerical value that has been measured under 2.16 kg load. [0182] 　[Density] 　using a Shinto Metal Industries, Ltd. hydraulic hot press machine set at 190 ℃, 100 Kg / Cm 2 in pressure molding a 0.5 mm thick sheet (spacer shape: in 240 × 240 × 0.5 mm thickness of the plate 45 × 45 × 0.5 mm, 9-cavity), using another Shinto metal Industries, Ltd. hydraulic hot press machine set at 20 ° C., 0.89 kg / cm 2 a measurement sample was cooled by compressing at a pressure of Created. Hot plate was used SUS plate of 5 of 5 mm thickness. The pressed sheet was heat treated for 1 hour at 120. ° C., after which linearly slowly cooled to room temperature over 1 h, it was measured by a density gradient tube. [0183] 　[Synthesis Example 1] [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) Synthesis of hafnium dichloride 　(i) bis ( 4-N- Morpho Li sulfonyl phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) synthesis of methane 　under a nitrogen atmosphere, 100 ml of a three-necked flask octamethyl octahydropentalene dibenzofluorene 1.24 g (3.21 mmol) , he was charged with dehydrated THF 80 ml. An ice-water bath under, slowly dropped 1.66 M of n- butyl lithium hexane solution 1.97 ml (3.26 mmol), was slowly stirred for 20 hours while returning to room temperature. Thereafter, the ice-water bath, followed by stirring 6,6-bis (4-N-morpholinophenyl Li sulfonyl phenyl) fulvene 1.08 g (2.69 mmol) was added at room temperature for 4 hours. Thereafter, the reaction solution was separated and the organic layer was added saturated ammonium chloride solution, and the aqueous layer extracted with diethyl ether. The resulting organic layers were combined with a saturated aqueous solution of sodium hydrogen carbonate, water, and washed once with saturated brine. Dried with magnesium sulfate, and the solvent was evaporated. After purification the resulting solid by column chromatography, bis (4-N- Morpho Li sulfonyl phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane 2.1 g (84.0%) as a white powder Obtained. Bis (4-N- Morpho Li sulfonyl phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) Identification of methane 1 was carried out by H NMR spectrum. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): Deruta / Ppm 7.3 (Br), 7.2-6.8 (Br), 6.5-6.0 (Br), 5.2 (S), 3.8 (S), 2.9 (S), 1.7 -1.5 (br), 1.4-1.2 (br ), 1.1-0.8 (br) [0184] 　(ii) [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) Synthesis of hafnium dichloride 　under a nitrogen atmosphere, 100 ml Schlenk tube bis (4-N- Morpho Li sulfonyl phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane 0.8 g (1.0 mmol), was dehydrated toluene 30 ml, dehydrated THF 0.4 g added. It was slowly added while cooling with a dry ice bath n- butyl lithium / hexane solution (1.66 M) 1.3 ml (2.0 mmol), After stirring for 30 minutes at room temperature, then heated at 40 ° C., and stirred for 4 hours. After returning to room temperature the reaction solution, the solvent was evaporated. The resulting dehydrated diethyl ether 50 ml was added to the solid, after cooling to -20 ° C., was added hafnium tetrachloride 0.317 g (0.98 mmol), and stirred for 16 hours while gradually heated to room temperature. Then was extracted solvent evaporated dehydrated dichloromethane. After concentrated again, and washed with dehydrated diethyl ether as a yellow solid [bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] to obtain a hafnium dichloride 0.45 g (43.3%). [Bis (4-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] Identification of hafnium dichloride 1 was carried out by H NMR spectrum. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): [delta] / ppm by 8.01 (s, 2H), 7.80-7.60 (yd, 4H), 7.00-6.80 (yd, 4H), 6.29 (s, 2H), 6.19 (t , J = 2.6 Hz, 2H) , 5.50 (t, J = 2.6 Hz, 2H), 3.83 (t, J = 4.8 Hz, 8H), 3.16-3.08 (m, 8H), 1.67-1.60 (m, 8H) , 1.46 (s, 6H), 1.36 (s, 6H), 0.96 (s, 6H), 0.85 (s, 6H) [0185] 　[Synthesis Example 2] [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) Synthesis of hafnium dichloride 　(i) 6,6 - bis [4- (dimethylamino) phenyl] synthesis of fulvene 　under a nitrogen atmosphere, lithium cyclopentadienide in 200 ml three-necked flask 3.06 g (42.4 mmol), 4,4'- bis (dimethylamino) benzophenone 10.1 g (37.5 mmol) and was added to the dehydration DME 100 ml. While cooling in an ice bath was added DMI 4.86 g (42.6 mmol), then stirred under reflux for 8 days. While cooling in an ice bath was slowly added water 50 ml, and stirred at room temperature for 30 minutes and further added dichloromethane 50 ml. The resulting solution of bi-layer was transferred to a 300 ml separatory funnel, washed three times and the organic layer with water 100 ml. After drying for 30 minutes with anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. Hexane / ethyl acetate mixed solvent: The solvent was distilled off under reduced pressure was extracted with (4: 1), was subjected to recrystallization in ethanol, as a red-brown solid 6,6-bis [4- (dimethylamino) phenyl ] fulvene 1.04 g (3.29 mmol, 8.8% ) was obtained. 6,6 Identification of bis [4- (dimethylamino) phenyl] fulvene is 1 was carried out by H NMR spectrum and FD-MS spectra. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): [delta] / ppm by 7.29-7.25 (yd, 4H), 6.71-6.65 (yd, 4H), 6.57-6.54 (yd, 2H), 6.36-6.34 (yd, 2H) , 3.02 (S, 12H) FD-MS spectrum: M / Z 316 (M Tasu ) [0186] 　(Ii) bis [4- (dimethylamino) phenyl] (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) Synthesis of methane 　under a nitrogen atmosphere, a 500 ml three-necked flask octamethyl octahydro-dibenzo fluorene 3.69 g ( 9.53 mmol) and was dehydrated cyclopentyl methyl ether 250 ml was added. While cooling in an ice bath was added n- butyl lithium / hexane solution (1.65 M) 6.10 ml of (10.1 mmol) slowly, followed by stirring at room temperature for 24 hours. 6,6-bis After addition of [4- (dimethylamino) phenyl] fulvene 3.00 g (9.48 mmol), it was heated to reflux for 6 days. While cooling in an ice bath was slowly added 200 ml of water, was transferred a solution of the resulting two layers into 1 l separatory funnel. Removing water layer after shaking several times with diethyl ether 200 ml, 3 times and the organic layer with water 200 ml, it was washed once with 200 ml saturated brine. After drying for 30 minutes with anhydrous magnesium sulfate to give an orange-brown solid, the solvent was distilled off under reduced pressure. Recrystallization in acetone, to give bis [4- (dimethylamino) phenyl] (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane 4.63 g (6.58 mmol, 69.4% ) as a pale yellow solid It was. Bis [4- (dimethylamino) phenyl] (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) Identification of methane was performed by FD-MS spectrum. The following shows the measurement values. FD-MS spectrum: M / Z 702 (M Tasu ) [0187] 　(Iii) [bis [4- (dimethyl amino) phenyl] methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) Synthesis of hafnium dichloride 　under a nitrogen atmosphere, 200 ml Schlenk tube bis [4- (dimethyl amino) phenyl] (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane 3.08 g (4.39 mmol), 80 ml and dehydration THF 0.74 ml of dehydrated toluene (9.1 mmol) sequentially It was added. While cooling in an ice bath n- butyl lithium / hexane solution (1.65 M) 5.50 ml (9.08 mmol) slowly added, red solution was obtained was stirred for 5 hours at 45 ° C.. The solvent was distilled off under reduced pressure to obtain a red solution again by addition of 80 ml of dehydrated diethyl ether. Was added methanol / dry ice bath while cooling hafnium tetrachloride 1.37 g (4.27 mmol), it was stirred for 16 hours while gradually heated to room temperature, an orange slurry was obtained. Bring solid obtained by distilling off the solvent under reduced pressure in the glove box, and extracted with dichloromethane washed with hexane. The solvent was evaporated under reduced pressure, to form a slurry by adding a small amount of toluene. The solvent was evaporated little by little under reduced pressure after addition of hexane was collected orange solid. The solid was washed with hexane, and dried under reduced pressure, as an orange solid [bis [4- (dimethylamino) phenyl] methylene (.eta 5 of 5 - cyclopentadienyl) (.eta 5 of 5 - octamethyl octahydro-dibenzo Full Oreniru)] hafnium dichloride 2.49 g (2.62 mmol, obtained 61.4%). [Bis [4- (dimethyl amino) phenyl] methylene (eta 5 - (eta cyclopentadienyl) 5 - octamethyloctahydrodibenzofluorenyl)] Identification of hafnium dichloride 1 to H NMR spectrum and FD-MS spectrum and I went. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): [delta] / ppm by 8.00 (s, 2H), 7.74-7.61 (yd, 4H), 6.80-6.69 (yd, 4H), 6.35 (s, 2H), 6.18 (t , J = 2.6 Hz, 2H) , 5.52 (t, J = 2.6 Hz, 2H), 2.90 (s, 12H), 1.7-1.5 (br m, 8H), 1.46 (s, 6H), 1.39 (s, 6H ), 0.99 (S, 6H), 0.86 (S, 6H) FD-MS spectrum: M / Z 950 (M Tasu ) [0188] 　[Synthesis Example 3] [bis (3-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) Synthesis of hafnium dichloride 　(i) bis ( 3-N- Morpho Li sulfonyl phenyl) (cyclopentadienyl) (synthesis of octamethyloctahydrodibenzofluorenyl) methane 　under a nitrogen atmosphere, into a three-necked flask of 100 ml octamethyl octahydropentalene dibenzofluorene 2.0 g (5.17 mmol) , he was charged with dehydrated THF 80 ml. An ice-water bath under, slowly dropped 1.56 M of n- butyl lithium hexane solution 3.5 ml (5.43 mmol), was slowly stirred for 4 hours while returning to room temperature. Thereafter, the ice-water bath, followed by stirring 6,6-bis (3-N- morpholine Li sulfonyl phenyl) fulvene 2.17 g (5.4 mmol) was added at room temperature for 5 hours. Thereafter, the reaction solution was separated and the organic layer was added saturated ammonium chloride solution, and the aqueous layer extracted with diethyl ether. The resulting organic layers were combined with a saturated aqueous solution of sodium hydrogen carbonate, water, and washed once with saturated brine. Dried with magnesium sulfate, and the solvent was evaporated. After purification the resulting solid by column chromatography, bis (3-N- Morpho Li sulfonyl phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane 2.8 g (71.0%) of the ocher-colored powder It was obtained as a. Bis (3-N- Morpho Li sulfonyl phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) Identification of methane 1 was carried out by H NMR spectrum. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): Deruta / Ppm 7.3-6.2 (Br), 5.30 (S), 3.9-3.6 (Br), 3.3-3.0 (Br), 1.8-1.4 (Br), 1.5- 1.0 (br), 1.0-0.8 (br ) [0189] 　(ii) [bis (3-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) Synthesis of hafnium dichloride 　under a nitrogen atmosphere, 100 ml Schlenk tube bis (3-N- Morpho Li sulfonyl phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane 0.8 g (1.0 mmol), was dehydrated toluene 30 ml, dehydrated THF 0.3 g added. It was slowly added while cooling with a dry ice bath n- butyl lithium / hexane solution (1.58 M) 1.3 ml (2.0 mmol), After stirring for 30 minutes at room temperature, then heated at 40 ° C., and stirred for 4 hours. After returning to room temperature the reaction solution, the solvent was evaporated. The resulting solid was added dehydrated diethyl ether 200 ml, cooled to -20 ° C., was added hafnium tetrachloride 0.30 g (0.94 mmol), and stirred for 16 hours while gradually heated to room temperature. Then the solvent was extracted with distilled off a large amount of dehydration hexane. After concentrating again, [bis (3-N- Morpho Li sulfonyl phenyl) as washed with a small amount of dehydration hexane yellow solid methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) ] hafnium dichloride 0.3 g (28.6%) was obtained. [Bis (3-N- Morpho Li sulfonyl phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] Identification of hafnium dichloride 1 was carried out by H NMR spectrum. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): [delta] / ppm by 7.98-7.97 (yd, 2H), 7.45-7.14 (yd, 6H), 6.81-6.74 (yd, 2H), 6.31 (s, 1H), 6.25 (s, 1H), 6.18-6.13 ( m, 2H), 5.48-5.45 (m, 2H), 3.81-3.75 (m, 4H), 3.64-3.62 (m, 4H), 3.17-3.10 (m, 4H) , 2.92-2.90 (m, 4H), 1.58-1.55 (m, 8H), 1.41 (s, 6H), 1.34 (s, 6H), 0.92 (s, 6H) [0190] 　[Synthesis Example 4] [bis (4-methoxy-3-methyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride synthesis of chloride 　(i) 4, synthesis of 4'-dimethoxyphenyl-3,3'-dimethyl benzophenone 　under nitrogen atmosphere, was added 500 ml three-necked flask of 4-bromo-2-methyl anisole 16.2 g (80.6 mmol) and dehydrated diethyl ether 200 ml. Methanol / dry-ice bath cooling while n- butyl lithium / hexane solution (1.64 M) 51.6 ml of (84.6 mmol) gradually added, and the mixture was stirred for 15 hours while gradually raising the temperature to room temperature. While cooling in an ice bath, the N- carboethoxy piperidine 5.06 g (32.2 mmol) and a solution consisting of dehydrated diethyl ether 50 ml, it was added slowly over 20 minutes using a dropping funnel. 1 hour at room temperature and stirred for 2 hours under heating to reflux was slowly added 2N hydrochloric acid 0.89 ml with ice-bath cooling. The resulting solution of bi-layer was transferred to a 500 ml separatory funnel, the aqueous layer was removed after shaking several times. Then the organic layer twice with 100 ml of water and once with saturated aqueous sodium bicarbonate solution 0.89 ml, washed once with saturated sodium chloride solution 0.89 ml, and dried over anhydrous magnesium sulfate for 30 minutes. After the solvent was evaporated under reduced pressure, it was recrystallized by addition of a small amount of hexane. The resulting solid was dried under reduced pressure to give a white solid 4,4-dimethoxy-3,3'-dimethyl benzophenone 7.57 g (28.0 mmol, 87.0% ) a. Identification of 4,4'-dimethoxy-3,3'-dimethyl benzophenone 1 was carried out by H NMR spectrum. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): [delta] / ppm by 7.63-7.60 (yd, 4H), 6.86-6.83 (yd, 2H), 3.89 (s, 6H), 2.24 (s, 6H) [0191] 　(Ii) 6,6-bis (4-methoxy-3-methylphenyl) Synthesis of fulvene 　under a nitrogen atmosphere, a 300 ml three-necked flask 4,4-dimethoxy-3,3'-dimethyl benzophenone 7.44 g (27.5 mmol) was dehydrated THF 0.89 ml, dehydrated cyclopentyl methyl ether 0.89 ml and 1,3-dimethyl-2-imidazolidinone 5.95 ml of (55.0 mmol) was added. It was added sodium cyclopentadienide / THF solution (2.0 M, Aldrich) 27.5 ml (55.0 mmol) at room temperature and stirred for 7 days under heating reflux. While cooling in an ice bath was slowly added 0.89 ml of water, was transferred a solution of the resulting two layers into 300 ml separatory funnel. Removing water layer after shaking several times with diethyl ether 100 ml, 3 times and the organic layer with water 0.89 ml, was washed once with saturated sodium chloride solution 0.89 ml. After drying for 30 minutes with anhydrous magnesium sulfate to give an orange-brown solid, the solvent was distilled off under reduced pressure. Silica gel chromatography (200 g, hexane: ethyl acetate = 9: 1) performs separation by, to give a red solution. The solvent was evaporated under reduced pressure, as an orange solid 6,6-bis (4-methoxy -3-methyl-phenyl) fulvene 1.67 g (5.24 mmol, 19.0% ) was obtained. 6,6-bis (4-methoxy -3-methyl-phenyl) Identification of fulvene is 1 was carried out by H NMR spectrum. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): [delta] / ppm by 7.16-7.11 (yd, 4H), 6.81 (d-, J = 4.1 from Hz, 2H), 6.58-6.56 (yd, 2H), 6.31-6.28 (yd , 2H), 3.87 (s, 6H), 2.20 (s, 6H) [0192] 　(Iii) bis (4-methoxy-3-methylphenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) Synthesis of methane 　under a nitrogen atmosphere, 0.89 ml three-necked flask octamethyl octahydro dibenzofluorene 1.27 g It was added (3.29 mmol) and 50 ml of dehydrated cyclopentyl methyl ether. While cooling in an ice bath n- butyl lithium / hexane solution (1.64 M) 2.10 ml (3.44 mmol) was added slowly, and stirred at room temperature for 16 hours. Was cooled with sodium chloride / ice bath, after addition of at -12 ° C. 6,6-bis (4-methoxy-3-methylphenyl) fulvene 1.10 g (3.44 mmol), and stirred at room temperature for 22 hours. While cooling in an ice bath was slowly added water 50 ml, was transferred a solution of the resulting two layers into 300 ml separatory funnel. Removing water layer after shaking several times with diethyl ether 100 ml, 3 times and the organic layer with water 0.89 ml, was washed once with saturated sodium chloride solution 0.89 ml. After drying for 30 minutes with anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. Performed a small amount of hexane was added and recrystallization, the resulting solid was dried under reduced pressure, bis as a pale yellow solid (4-methoxy-3-methylphenyl) (cyclopentadienyl) (octamethyl octahydro-dibenzo Full Oreniru) methane 1.98 g (2.81 mmol, yield 85.3%). Bis (4-methoxy-3-methylphenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) Identification of methane was performed by FD-MS spectrum. The following shows the measurement values. FD-MS spectrum: M / Z 704 (M Tasu ) [0193] 　(Iv) [bis (4-methoxy-3-methyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) Synthesis of hafnium dichloride 　under a nitrogen atmosphere, 100 ml Schlenk tube-bis (4-methoxy-3-methyl phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane 1.00 g (1.42 mmol), dehydrated toluene 40 ml and dehydration THF 240 μl (2.96 mmol) It was added sequentially. While cooling in an ice bath n- butyl lithium / hexane solution (1.64 M) 1.80 ml (2.95 mmol) was added slowly, the red slurry obtained was stirred for 5 hours at 45 ° C.. The solvent was distilled off under reduced pressure to obtain a red solution with the addition of dehydrated diethyl ether 40 ml. It was added methanol / dry cooling with hafnium tetrachloride 418 mg in ice bath (1.30 mmol), was stirred for 16 hours while gradually heated to room temperature, an orange slurry was obtained. Bring solid obtained by distilling off the solvent under reduced pressure in the glove box, and extracted with hexane. A small amount of hexane was added to the solid obtained by evaporating the solvent under reduced pressure, an orange solid precipitated was allowed to stand at -20 ℃. The solid was filtered off was collected and dried under reduced pressure after washed with a small amount of hexane, [bis (4-methoxy-3-methylphenyl) methylene as an orange solid (.eta 5 of 5 - cyclopentadienyl) (.eta 5 - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride 1.06 g (1.11 mmol, obtained 85.3%). [Bis (4-methoxy-3-methyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] Identification of hafnium dichloride 1 H NMR spectrum and FD-MS spectrum in went. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): [delta] / ppm by 8.02 (s, 2H), 7.71-7.53 (yd, 4H), 6.88-6.77 (yd, 2H), 6.29-6.27 (yd, 2H), 6.21 -6.18 (m, 2H), 5.53-5.47 (m, 2H), 3.83-3.77 (m, 6H), 2.28-2.27 + 2.09-2.08 (m, 6H), 1.7-1.5 (br m, 8H), 1.46 (S, 6H), 1.40-1.39 (M, 6H), 0.99-0.94 (M, 6H), 0.85 (S, 6H) FD-MS spectrum: M / Z 952 (M Tasu ) [0194] 　[Synthesis Example 5] [bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) Synthesis of hafnium dichloride 　(i) 4,4'-dimethoxy-3,3 ', 5,5'-synthesis of tetra-methyl benzophenone 　under a nitrogen atmosphere, in 500 ml three-necked flask 4-bromo-2,6-dimethyl anisole 16.7 g (77.6 mmol) and dehydration diethyl ether was added 150 ml. Methanol / while cooling in a dry ice bath n- butyl lithium / hexane solution (1.64 M) was added slowly 49.7 ml of (81.5 mmol), and stirred for 16 hours while gradually heated to room temperature. While cooling in an ice bath, the N- carboethoxy piperidine 4.83 g (30.7 mmol) and a solution consisting of dehydrated diethyl ether 50 ml, it was added slowly over 20 minutes using a dropping funnel. 1 hour at room temperature and stirred for 2 hours under heating to reflux was slowly added 2N hydrochloric acid 0.89 ml with ice-bath cooling. The resulting solution of bi-layer was transferred to a 500 ml separatory funnel, the aqueous layer was removed after shaking several times. Then the organic layer twice with 100 ml of water and once with saturated aqueous sodium bicarbonate solution 0.89 ml, washed once with saturated sodium chloride solution 0.89 ml, and dried over anhydrous magnesium sulfate for 30 minutes. After evaporation of the solvent under reduced pressure, recrystallized by adding small amount of hexane and the resulting solid was washed with a small amount of hexane. And dried under reduced pressure, 4,4'-dimethoxy-3,3 as a white solid ', was obtained 5,5'-tetra-methyl-benzophenone 6.83 g (22.9 mmol, 74.5% ) a. 4,4'-dimethoxy-3,3 ', identification of 5,5'-tetra-methyl benzophenone 1 was carried out by H NMR spectrum. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): [delta] / ppm by 7.44 (s, 4H), 3.77 (s, 6H), 2.31 (s, 12H) [0195] 　(Ii) 6,6-bis (4-methoxy-3,5-dimethylphenyl) Synthesis of fulvene 　under a nitrogen atmosphere, a 300 ml three-necked flask 4,4-dimethoxy-3,3 ', 5,5'-tetra methylbenzophenone 6.76 g (22.7 mmol), was dehydrated THF 100 ml, dried cyclopentyl methyl ether 0.89 ml and 1,3-dimethyl-2-imidazolidinone 4.90 ml of (45.3 mmol) was added. It was added sodium cyclopentadienide / THF solution (2.0 M, Aldrich) 22.7 ml (45.4 mmol) at room temperature and stirred for 7 days under heating reflux. While cooling in an ice bath was slowly added 0.89 ml of water, was transferred a solution of the resulting two layers into 300 ml separatory funnel. Removing water layer after shaking several times with diethyl ether 100 ml, 3 times and the organic layer with water 0.89 ml, was washed once with saturated sodium chloride solution 0.89 ml. After drying for 30 minutes with anhydrous magnesium sulfate to give an orange-brown solid, the solvent was distilled off under reduced pressure. Silica gel chromatography (450 g, hexane: ethyl acetate = 9: 1) performs separation by, to give a red solution. The solvent was distilled off under reduced pressure, as an orange solid 6,6-bis (4-methoxy-3,5-dimethylphenyl) fulvene 3.80 g (11.0 mmol, 48.4% ) was obtained. 6,6-identification of bis (4-methoxy-3,5-dimethyl-phenyl) fulvene is 1 was carried out by H NMR spectrum. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): [delta] / ppm by 6.95 (s, 4H), 6.57-6.55 (yd, 2H), 6.28-6.26 (yd, 2H), 3.77 (s, 6H), 2.27 (s , 12H) [0196] 　(Iii) bis (4-methoxy-3,5-dimethylphenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) Synthesis of methane 　under a nitrogen atmosphere, octamethyl octahydro dibenzofluorene to 200 ml three-necked flask the 1.59 g (4.12 mmol) and 50 ml of dehydrated cyclopentyl methyl ether was added. While cooling in an ice bath n- butyl lithium / hexane solution (1.64 M) 2.70 ml (4.43 mmol) was added slowly, and stirred at room temperature for 16 hours. While cooling in an ice bath 6,6-bis (4-methoxy-3,5-dimethylphenyl) fulvene 1.51 g (4.35 mmol) was added thereto, followed by stirring at room temperature for 4 hours. While cooling in an ice bath was slowly added 0.89 ml of water, was transferred a solution of the resulting two layers into 300 ml separatory funnel. Removing water layer after shaking several times with diethyl ether 100 ml, 3 times and the organic layer with water 0.89 ml, was washed once with saturated sodium chloride solution 0.89 ml. After drying for 30 minutes with anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. Performed a small amount of methanol was added and recrystallization, the resulting solid was washed with a small amount of ethanol. And dried under reduced pressure to give bis (4-methoxy-3,5-dimethylphenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane 2.35 g (3.21 mmol, 77.8% ) as a white solid It was. Bis (4-methoxy-3,5-dimethyl-phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) Identification of methane were performed at FD-MS spectrum. The following shows the measurement values. FD-MS spectrum: M / Z 732 (M Tasu ) [0197] 　(Iv) [bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) Synthesis of hafnium dichloride 　under a nitrogen atmosphere, 100 ml Schlenk tube to bis (4-methoxy-3,5-dimethyl-phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane 1.30 g (1.77 mmol), dehydrated toluene 40 ml and dehydration THF 300 μl It was sequentially added (3.70 mmol). While cooling in an ice bath n- butyl lithium / hexane solution (1.64 M) 2.20 ml (3.61 mmol) was added slowly, the red slurry obtained was stirred for 5 hours at 45 ° C.. The solvent was distilled off under reduced pressure to obtain a red solution with the addition of dehydrated diethyl ether 40 ml. While cooling with methanol / dry ice bath was added hafnium tetrachloride 532 mg (1.66 mmol), was stirred for 18 hours while gradually heated to room temperature, an orange slurry was obtained. Bring solid obtained by distilling off the solvent under reduced pressure in the glove box, and extracted with hexane. A small amount of hexane and diethyl ether was added to the solid obtained by distilling off the solvent under reduced pressure, an orange solid precipitated was allowed to stand at -20 ° C.. The solid was filtered off was collected and dried under reduced pressure after washed with a small amount of hexane as an orange solid [bis (4-methoxy-3,5-dimethylphenyl) methylene (.eta 5 of 5 - cyclopentadienyl) (eta 5 was obtained - octamethyloctahydrodibenzofluorenyl)] hafnium dichloride 1.27 g (1.29 mmol, 77.7% ) a. [Bis (4-methoxy-3,5-dimethyl-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl)] Identification of hafnium dichloride 1 H NMR spectrum and FD- It was carried out by MS spectrum. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): [delta] / ppm by 8.02 (s, 2H), 7.55-7.43 (yd, 4H), 6.28 (s, 2H), 6.19 (t, J = 2.6 Hz, 2H), 5.48 (t, J = 2.6 Hz , 2H), 3.72 (s, 6H), 2.35 (s, 6H), 2.16 (s, 6H), 1.7-1.5 (br m, 8H), 1.46 (s, 6H), 1.40 (S, 6H), 0.98 (S, 6H), 0.86 (S, 6H) FD-MS spectrum: M / Z 980 (M Tasu ) [0198] 　[Synthesis Example 6] [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) Synthesis of hafnium dichloride 　(i) 6,6- bis ( 4-methoxyphenyl) synthesis of fulvene 　nitrogen atmosphere, was added lithium cyclopentadienide 8.28 g (115 mmol) and dehydrated THF 200 ml to 500 ml three-necked flask. While cooling in an ice bath was added DMI 13.6 g (119 mmol), and stirred at room temperature for 30 minutes. Then 4,4'-dimethoxy benzophenone 25.3 g of (105 mmol) was added and stirred for one week under heating to reflux. While cooling in an ice bath was slowly added 0.89 ml of water and stirred for 30 minutes at room temperature and further added to 200 ml of dichloromethane. The resulting solution of two layers was transferred to a 500 ml separatory funnel, washed 3 times and the organic layer with water 200 ml. After drying for 30 minutes with anhydrous magnesium sulfate to give an orange-brown solid, the solvent was distilled off under reduced pressure. Silica gel chromatography (700 g, hexane: ethyl acetate = 4: 1) performs separation by, to give a red solution. The solvent was evaporated under reduced pressure, as an orange solid 6,6-bis (4-methoxy-phenyl) fulvene 9.32 g (32.1 mmol, 30.7% ) was obtained. 6,6-identification of bis (4-methoxy-phenyl) fulvene is 1 was carried out by H NMR spectrum. The following shows the measurement values. 1 H NMR spectrum (270 MHz, CDCl 3 ): [delta] / ppm by 7.28-7.23 (yd, 4H), 6.92-6.87 (yd, 4H), 6.59-6.57 (yd, 2H), 6.30-6.28 (yd, 2H) , 3.84 (s, 6H) [0199] 　(Ii) bis (4-methoxy-phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) Synthesis of methane 　under a nitrogen atmosphere, 200 ml three-necked flask to octamethyl octahydropentalene dibenzofluorene 1.33 g (3.45 mmol) and it was added to 100 ml of dehydrated t- butyl methyl ether. While cooling in an ice bath n- butyl lithium / hexane solution (1.63 M) 2.30 ml of (3.75 mmol) was added slowly and stirred for 4 hours at room temperature. 6,6-bis (4-methoxyphenyl) fulvene 0.909 g (3.13 mmol) were added thereto, and was subjected to heating reflux for 40 hours. While cooling in an ice bath was slowly added 50 ml of water and diethyl ether 50 ml, was transferred the resulting solution to 500 ml separatory funnel. The aqueous layer was separated after shaking several times, 3 times and the organic layer with water 0.89 ml, was washed once with saturated sodium chloride solution 0.89 ml. After drying for 30 minutes with anhydrous magnesium sulfate, and the solvent was evaporated under reduced pressure. Silica gel chromatography (0.99 g, hexane: ethyl acetate = 19: 1) performs separation by, to give a colorless solution. The solvent was evaporated under reduced pressure, a pale yellow solid as bis (4-methoxy-phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane 2.06 g (3.04 mmol, 97.3% ) was obtained. Identification of bis (4-methoxy-phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane were performed at FD-MS spectrum. The following shows the measurement values. FD-MS spectrum: M / Z 676 (M Tasu ) [0200] 　(Iii) [bis (4-methoxy-phenyl) methylene (eta 5 - cyclopentadienyl) (eta 5 - octamethyloctahydrodibenzofluorenyl) Synthesis of hafnium dichloride 　under a nitrogen atmosphere, 100 ml Schlenk tube to bis ( 4-methoxy-phenyl) (cyclopentadienyl) (octamethyloctahydrodibenzofluorenyl) methane 1.06 g (1.57 mmol), it was dehydrated toluene 40 ml and dehydration THF 270 μl of the (3.33 mmol) were added successively. While cooling in an ice bath n- butyl lithium / hexane solution (1.64 M) 2.00 ml (3.28 mmol) slowly added, red solution was obtained was stirred for 5 hours at 45 ° C.. The solvent was distilled off under reduced pressure to obtain a red solution again with the addition of dehydrated diethyl ether 40 ml. While cooling with methanol / dry ice bath was added tetrachloride hafnium two diethyl ether complex 718 mg (1.53 mmol), was stirred for 17 hours while gradually heated to room temperature, an orange slurry was obtained. Bring solid obtained by distilling off the solvent under reduced pressure in the glove box, and extracted with dichloromethane washed with hexane. The solid obtained by evaporating the solvent under reduced pressure was dissolved in toluene, orange solid was collected and the solvent was distilled off little by little under reduced pressure after the addition of hexane was precipitated. The solid was filtered off was collected and dried under vacuum after washing with hexane, as an orange solid [bis (4-methoxyphenyl) methylene (.eta 5 of 5 - cyclopentadienyl) (.eta 5 of 5 - octa methyl octahydro dibenzo fluorenyl)] hafnium dichloride 984 mg (1.06 mmol, obtained a 69.4%). [Bis (4-methoxy-phenyl) methylene (eta 5 - (eta cyclopentadienyl) 5 - octamethyloctahydrodibenzofluorenyl)] Identification of hafnium dichloride 1 was carried out by H NMR spectrum and FD-MS spectrum . The following shows the measurement values. The scope of the claims [Claim 1] Bridged metallocene compound (A) represented by the following general formula [I], and (B) (B-1) an organometallic compound, (B-2) an organoaluminum oxy compound and (B-3) bridged metallocene compound (A ) reacting with at least one compound selected from the compounds to form an ion pair in the presence of an olefin polymerization catalyst comprising ethylene, wherein the ethylene and carbon atoms copolymerized three or more α- olefins / α- process for producing an olefin copolymer. [Formula 1] In the (Formula [the I], Y-carbon atom, a silicon atom, selected from germanium atoms and tin atoms, 　M is titanium atom, zirconium atom or hafnium atom, 　R 1 , R 2 , R 3 , R 4 , R 5 of 5 , R . 6 , R . 7 , R . 8 , R . 9 , R 10 , R . 11 and R . 12 is a hydrogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, an atom or a substituent selected from a halogen atom and a halogen-containing group, may be the same as or different from each other, 　R 1 from R . 12 even if adjacent substituents to join to each other to form a ring Frequently, 　R . 13 and R 14 is an aryl group or a substituted aryl group, either or different and each is identical to the case of the substituted aryl group, 　R . 13 and R 14 at least one of the aryl groups one or more hydrogen atoms a substituted aryl group substituent constant Hammett's rule σ is replaced with -0.2 or less of the electron-donating substituent, respectively when having a plurality of electron-donating substituents the of the electron-donating substituent may be the same or different, other than the electron-donating substituent, a hydrocarbon group having 1 to 20 carbon atoms, a silicon-containing group, a nitrogen-containing group, an oxygen-containing group, a halogen atom and halogen-containing may have a substituent group selected from the group, each substituent when having a plurality of said substituent is a substituent aryl group which may be the same or different, 　Q is a halogen atom, a carbon hydrocarbon groups having 1 20, selected from a neutral ligand capable of coordination with an anionic ligand and a lone pair at the same or different combination, 　j is an integer of 1 to 4.) [Claim 2] 　R in the general formula [the I] 1 , R 2 , R 3 and R 4 , characterized in that are all hydrogen atom, a manufacturing method of the ethylene / .alpha.-olefin copolymer according to claim 1. [Claim 3] 　Characterized in that Y in the general formula [I] is a carbon atom, the production method of the ethylene / .alpha.-olefin copolymer according to claim 1 or 2. [Claim 4] 　The electron-donating substituent, characterized in that it is a group selected from a nitrogen-containing group and an oxygen-containing group, the preparation of ethylene / .alpha.-olefin copolymer according to any one of claims 1 to 3, Method. [Claim 5] 　R in the general formula [the I] . 13 and R 14 , characterized in that it is the same substituted aryl group, the manufacturing method of the ethylene / .alpha.-olefin copolymer according to claim 4. [6.] 　R in the general formula [the I] . 13 and R 14 substitution, comprising a group selected from a nitrogen-containing group and an oxygen-containing group as the electron-donating substituents, the meta and / or para position on the binding of Y characterized in that it is a phenyl group, the manufacturing method of the ethylene / .alpha.-olefin copolymer according to claim 4 or 5. [7.] 　R in the general formula [the I] . 13 and R 14 , characterized in that a substituted phenyl group containing a nitrogen-containing group represented by the following general formula [II] as the electron-donating substituent, claims process for producing an ethylene / .alpha.-olefin copolymer according to any one of 4-6. [Formula 2] In (formula [II], R 15 and R 16 are a hydrogen atom, a hydrocarbon group, a silicon-containing group, atom or a substituent selected from an oxygen-containing groups and halogen-containing group having 1 to 20 carbon atoms , may be the same as or different from each other, may form a ring bonded to each other, right drawn lines N represents a bond with a phenyl group.) [8.] 　R in the general formula [the I] . 13 and R 14 , characterized in that a substituted phenyl group containing an oxygen-containing group represented by the following general formula [III] as the electron-donating substituent, claims process for producing an ethylene / .alpha.-olefin copolymer according to any one of 4-6. [Formula 3] in (formula [III], R . 17 is a hydrogen atom, atom or a substituent group selected from a hydrocarbon group, a silicon-containing group, nitrogen-containing groups and halogen-containing groups having 1 to 20 carbon atoms, the O lines drawn on the right represents a bond with a phenyl group.) [9.] 　R in the general formula [the I] 5 of 5 , R . 8 , R . 9 and R . 12 , characterized in that are all hydrogen atoms, according to any one of claims 1 to 8 ethylene / .alpha.-olefin copolymerization production method of coalescence. [10.] 　R in the general formula [the I] . 6 , R . 7 , R 10 and R . 11 , at least two hydrocarbon groups, silicon-containing group, a nitrogen-containing group, an oxygen-containing group, a substituent selected from halogen atoms and halogen-containing groups of the and characterized in that a method for producing the ethylene / .alpha.-olefin copolymer according to any one of claims 1 to 9. [11.] 　R in the general formula [the I] . 6 and R . 7 , and / or R 10 and R . 11 , characterized in that are bonded to each other to form a ring, the ethylene / .alpha.-olefin interpolymer according to claim 10 method for producing a polymer. [12.] 　R in the general formula [the I] . 6 and R . 7 , and R 10 and R 11 , characterized in that are bonded to each other to form a ring, the ethylene / .alpha.-olefin copolymer according to claim 11 method of manufacturing. [13.] 　R in the general formula [the I] . 6 and R . 7 , and R 10 and R . 11 , wherein the ring formed by bonding is five to seven membered ring, according to claim 12 ethylene / alpha - process for producing an olefin copolymer. [14.] 　R in the general formula [the I] . 6 and R . 7 , and R 10 and R . 11 , wherein the ring formed by bonding is six-membered ring, according to claim 13 ethylene / .alpha.-olefin production method of the copolymer. [15.] 　In the presence of an olefin polymerization catalyst comprising a bridged metallocene compound characterized by being represented by the following general formula [IV], characterized by copolymerizing ethylene and α- olefin, ethylene according to claim 14 / α- process for producing an olefin copolymer. [Formula 4] in (formula [IV], M is titanium atom, zirconium atom or hafnium atom, 　R . 13 and R 14 are both represented by the general formula [II] as the electron-donating substituent that either a substituted phenyl group containing a nitrogen-containing group, either substituted phenyl group containing an oxygen-containing group represented by the general formula [III] as the electron-donating substituent, 　R 18 , R . 19 , R 20 , and R 21 is a hydrogen atom or a methyl group, 　the same Q is a halogen atom, a hydrocarbon group having 1 to 20 carbon atoms, a neutral ligand capable of coordination with an anionic ligand and a lone pair or chosen in different combinations, 　J is an integer from 1 to 4.) [16.] 　Wherein the M is hafnium in the general formula [I], the production method of the ethylene / .alpha.-olefin copolymer according to any one of claims 1 to 15. [17.] 　A manufacturing method of the ethylene / .alpha.-olefin copolymer, when the sum of the proportion of the constituent unit derived from each monomer in the polymer is 100 mol%, the proportion of the structural unit derived from ethylene is 50 mol% characterized by polymerization seems that the ethylene polymer is obtained or, the manufacturing method of the ethylene / .alpha.-olefin copolymer according to any one of claims 1 to 16. [18.] 　Wherein the polymerization temperature is 100 ~ 300 ℃, the manufacturing method of the ethylene / .alpha.-olefin copolymer according to any one of claims 1 to 17.