WE CLAIM:
[Claim 1]
A black pigment comprising (a) a core containing at least one organic black pigment selected from the group consisting of benzodifuranone-based black pigments, perylene-based black pigments, azo-based black pigments, and isomers thereof and (b) a coating layer containing silica and/or a metal oxide and/or a metal hydroxide.
[Claim 2]
A black pigment according to claim 1 wherein the core contains
(a) a benzodifuranone-based black pigment represented by the general formula (1) or (2):
[Chemical formula 1]

or an isomer thereof
wherein R1 and R6 independently represent hydrogen atom, CH3, CF3, fluorine atom, or chlorine atom; R2, R3, R4, R5, R7, R8, R9, and R10 independently represent hydrogen atom, a halogen atom, an alkyl group containing 1 to 12 carbon atoms, a cycloalkyl group containing 1 to 12 carbon atoms, an alkenyl group containing 1 to 12 carbon atoms, a cycloalkenyl group containing 1 to 12 carbon atoms, alkynyl group containing 1 to 12 carbon atoms, COOH, COOR11, COO-, CONH2, CONHR11, CONR11R12, CN, OH, OR11, OCOR11, OCONH2, OCONHR11, OCONR11R12, NO2, NH2, NHR11, NR11R12, NHCOR11, NR11COR12, N=CH2, N=CHR11, N=CR11R12, SH, SR11, SOR11, SO2R11, SO3R11, SO3H, SO3-, SO2NH2, SO2NHR11, or SO2NR11R12, with the proviso that R2 and R3, R3 and R4, R4 and R5, R7 and R8, R8

and R9, and R9 and R10 may be directly bonded or via O, S, NH, or NR11; and
R11 and R12 independently represent alkyl group containing 1 to 12 carbon atoms, cycloalkyl group containing 1 to 12 carbon atoms, alkenyl group containing 1 to 12 carbon atoms, cycloalkenyl group containing 1 to 12 carbon atoms, or alkynyl group containing 1 to 12 carbon atoms.
[Claim 3] A black pigment according to claim 1 or 2 wherein the benzodifuranone-based black pigment contains a compound represented by the formula (3):
[Chemical formula 2]

[Claim 4]
A black pigment according to any one of claims 1 to 3 wherein the metal oxide comprises alumina. [Claim 5]
A black pigment according to any one of claims 1 to 4 wherein the coating layer contains silica. [Claim 6]
A black pigment according to claim 5 wherein content of the silica in the coating layer is 1.0 to 20.0 parts by weight in terms of SiO2 in relation to 100 parts by weight of the core. [Claim 7]
A black pigment according to any one of claims 1 to 6 wherein the coating layer contains silica and/or a metal oxide and/or a metal hydroxide and has the surface modified with a radical-polymerizable group and silicon atom-containing group. [Claim 8]
A pigment dispersion containing a black pigment according to any one of claims 1 to 7, a dispersant, and a solvent. [Claim 9]
A pigment dispersion according to claim 8 wherein the dispersant contains an alkali-soluble resin.

[Claim 10]
A photosensitive composition containing a black pigment according to any one of claims 1 to 7, an alkali-soluble resin, and a photosensitive agent.
[Claim 11]
A photosensitive composition according to claim 10 wherein the composition contains a compound having at least two radical-polymerizable groups as the photosensitive agent and a photoinitiator as the photosensitive agent, and the photosensitive composition has negative photosensitivity.
[Claim 12]
A photosensitive composition according to claim 11 wherein the compound having at least two radical-polymerizable groups contains a compound having a structure derived from a compound having at least three hydroxy groups, at least three ethylenically unsaturated double bond groups, and at least one aliphatic chain in the molecule, the aliphatic chain having an average molecular weight of 40 to 500. [Claim 13]
A photosensitive composition according to any one of claims 10 to 12 wherein the alkali-soluble resin includes an alkali-soluble polyimide resin having a structure represented by the general formula (11):
[Chemical formula 3]

wherein R21 represents a tetravalent to decavalent organic group; R22 represents a divalent to octavalent organic group; R23 and R24 independently represent a phenolic hydroxy group, sulfonate group, or thiol group; and p and q independently represent a real number in the range of 0 to 6. [Claim 14]
A cured film comprising a cured product of the photosensitive composition according to any one of claims 10 to 13.

[Claim 15]
A pixel division layer of an organic EL display comprising a cured product of the photosensitive composition according to any one of claims 10 to 13. [Claim 16]
An organic EL display having a cured film according to claim 14. [Claim 17]
A method for producing the black pigment according to claim 5 comprising surface treatment steps of
adding an alkali metal silicate and an inorganic acid to an aqueous suspension of the pigment containing the core maintained at a pH in the range of at least 2 to less than 7 to coat silica on the surface of the core [Claim 18]
A method for producing the black pigment according to claim 4 comprising surface treatment steps of
adding an alkali metal aluminate and an inorganic acid to an aqueous suspension of the pigment containing the core maintained at a pH in the range of at least 2 to less than 7 to coat aluminum hydroxide on the surface of the core [Claim 19]
A method for producing the black pigment according to claim 17 further comprising the step of removing ionic impurities by using an ion exchange resin after the surface treatment step.