1. Title of the invention

Manufacture of Electroluminescent materials in inert gas environment

2. Applicant

Name : Eesavyasa Technologies Pvt. Ltd.

Nationality : Indian

Address : 108-B, I.D.A. Khanapuram, Khammam(DT), Andhra Pradesh. Pin: 507002

3. Preamble to the description:

Complete specification:

Summary:

In the summary of invention, each important salient feature is explained as follows:

1. Two or more number of chamber s are taken along with platinum coated or silicon crucible with constitutes and their weights are measured and noted. The chambers are completely evacuated.

2. The completely evacuated chambers are filled with Argon, Neon or nitrogen or any other inert gas and provide with value level display arrangement to monitor the inert atmosphere.

3. The two chambers will be connected through ceramic or S.S. 309 pipe, in which a nefion based material with minute pores are coated with graphite powder, which acts as an internal NRV, which allows only ions pass through membrane, but not compounds.

4. A metal rod placer in metal salt solution arranged as anode for example Cadmium or Zinc rod in Zinc sulphide or Zinc Selenide, Zinc telluride, etc. The metal rod which is supper to be doped will be placed in metal fused solution as cathode.

5. The both chambers are connected to two different vacuum pumps and argon like inert gas cylinders.

6. The chambers are surrounds by induction furnaces to heat the materials to their fused states i.e below their melting points where the mobility of ions is very high.

7. When current is passed through both electrodes, the mobility of dopent metal ions through membrane are controlled with external micro processor, where even micro seconds of time period of ion flow is possible.

8. Due to the control orders of ions of dopent metals, the doping efficiency enhance abnormally.

9. The mixed vapours of metal salts after doping can be sent in to another vessel where vapours deposition over refined substance is possible.

10. As the whole reaction is taking place in gaseous phase, the rate of reaction and yield will be extraordinarily high.

11. After producing electroluminescent powder in the above method, it will be taken in fused stated into a sputtering chamber to deposit microlayers. Then piezo electric materials like quartz, lead titanium zirconate, etc., are taken in fused state and subjected for evaporation to deposit as second layer over electroluminescent powder layer. This process continues to produce multiple layers where in between graphite powder layers are arranged to produce special type of optical devices which finds multiple applications as claimed.

4. Description

The present invention is related to a method for commercial manufacturing of electroluminescent phosphors or a general a method for doping any material in to other material using electro thermal technique, where specially designing manufacturer and electrolysis are used to acquire desired research in shorter possible time. This method is a common method in which all type of phosphors or semi conductor materials can be synthesis to produce verity of phosphors.

Background of invention

Electroluminescence is the nature of certain material like zinc sulphide or cadmium sulphide, or any other metal sulphides, selenides and tellurides when doped with very little quantities of nearby elements in periodic table like copper, silver, Mn, Au, Al, Yittrium etc, they exhibit various type of colors when pass through current.

In this present scenario through many methods are available, they are roughly divided in to wet method and dry method. In wet method of synthesis, the empirical formula of final phosphors according to relevant salts of the constituents will be taken over organic molecular surfaces, provide agitation in oxygen free environment to get doper materials. But in this method as the cost of production is too high hence the product cost is also expensive.

In second method called as dry method, the metal salts and their dopent metal will be heated in nitrogen environment and their doping ability also varies on various conditions. But in this method, the purity and yields of the output is not much useful and cost effective.

Hence the present method of dry production is designed to achieve maximum output and in to improve the doping rate and converting ability of the doping also through permeable membrane.

6. Brief description of drawings:

1. The chambers (1) are made up of either ceramic or S.S plates. They are joined with leak proof welding and evacuated with help of diffusion vacuum pump where 10' vacuum is created.

2. The chambers (1) are connected to two cylinders (6) where inert gas like Argon, Neon or Xenon are introduced.

3. The materials like zinc sulphide, Zinc selenide or Zinc telluride or similar cadmium salts will be taken and heats with the help of external induction furnace.

They are also provided with occasional ultrasonic agitations.

4. The permeable membrane made up of nefion material coated with graphite is fitted in to the membrane chamber.

5. The electrodes (7) are connected with external circuit.

6. Metal rods to the doped for example like copper, manganese, silver, yttrium or any such metal will be taken as cathode.

7. Metal rods (7) to be used as anode will be the metals of metal salts taken for doping for example Zinc rods will be used in Zinc sulphide solution.

8. An additional went will be provided for reaction chamber which will be useful for collecting vapors of end product.

7. Claims

1. We claim that this is special manufacturing method for synthesis of electroluminescent material where controlled doping and different layers of other materials can be produced.

2. We claim that this method provides an opportunity to develop electroluminescent material whose longevity can be controlled and assured.

3. We claim that this method explains about the way of building permeable membrane of special nature to achieve required rate of ion mobility.

4. We claim that this method also explain about the flexibility of method where two or more ingredients can be connected in series or one after other to achieves multiplicity of addition to the substances targeted.

5. We claim that using this method, when layered with piezo electric materials, device produced acts as opto-electrical transistor which finds its application in medical imaging like direct display of ultrasound into optical display which can be digitized.

6. We claim that the device described in claim number 5 can be used in industry where ultrasonic flaw detection can be optically converted and recorded.

7. We claim that the above claim number 5 provide an opportunity to record all kinds of mechanical vibrations, waves, electrical signals converting into optical data and can be encrypted into low data storage devices wherever possible in industry.

8. We claim that with combination of two or more metal salts doped with required metals as described in said procedure, wide range of phosphors are synthesized which are useful in detection of X-rays, laser rays, microwaves, radiowaves, gamma waves can be produced and find its application in opto-electronics and medical equipments.

9. We claim that same technology can be used for manufacturing of piezo electric materials like lead titanium zirconate and other salts which can be doped with required metals.

10. We claim that same principle of evaporative vapor mixing using electrodes can be used for synthesis of indium gallium salts like LED manufacturing chemicals.