Tokyo Ohka Kogyo Co., Ltd.

Pvg Solutions Inc.

Katsuya Tanitsu

Muneo Nakayama

Akira Hashimoto

Toshimasa Nakayama

Hatsuyuki Tanaka

Toshiro Morita

Atsushi Murota

Yoshimi Sato

Atsushi Kawakami

Takaaki Hirai

Toshihiro Nishimura

Takashi Kamizono

Motoki Takahashi

Takayuki Ogino

Futoshi Kato

Ayumu Imai

Yasuyuki Kano

Shinji Goda

Seiji Ohishi

A diffusion agent composition including an impurity-diffusing component (A); a binder resin (B) that thermally decomposes and disappears below a temperature at which the impurity-diffusing component (A) begins to thermally diffuse; SiOfine particles (C); and an organic solvent (D) that contains an organic solvent (D1) having a boiling point of at least 100&#xb0; C.

Diffusion agent composition, method of forming impurity diffusion layer, and solar cell

A method of producing a solar cell, including: a first coating step in which a pre-wet composition is spin-coated on a surface of a semiconductor substrate; a second coating step in which a diffusing material including a solvent and a diffusing agent containing a first impurity element is spin-coated on the surface where the pre-wet composition has been spin-coated, so as to form a coating film of the diffusing agent; and a first impurity diffusion layer forming step in which the semiconductor substrate having the coating film formed thereon is heated, so as to form a first impurity diffusion layer in which the impurity element contained in the diffusing agent is diffused.

Method of producing solar cell

Provided are: a diffusing agent composition for ink-jet; a method for production of electrode and solar battery using the diffusing agent composition; and a solar battery produced by the method for production. The diffusing agent composition for ink-jet includes (a) a silicon compound, (b) an impurity-diffusing component and (c) a solvent, in which: the solvent (c) contains (c1) a solvent having a boiling point of no higher than 100&#xb0; C. and (c2) a solvent having a boiling point of 180 to 230&#xb0; C.; and the solvent (c1) is contained at a ratio of 70 to 90% by mass and the solvent (c2) is contained at a ratio of 1 to 20% by mass both relative to the total mass of the composition.

Diffusing agent composition for ink-jet, and method for production of electrode or solar battery using the composition

An embodiment of the present invention relates to a diffusing agent composition used in printing an impurity-diffusing component onto a semiconductor substrate, wherein the diffusing agent composition contains: a hydrolysis product of alkoxysilane (A); a component (B) containing at least one selected from the group consisting of a hydrolysis product of alkoxy titanium, a hydrolysis product of alkoxy zirconium, titania fine particle, and zirconia fine particle; an impurity-diffusing component (C); and an organic solvent (D).

Diffusing agent composition, method of forming impurity diffusion layer, and solar battery

Proposed is a novel method for the formation of a protective coating film having a pencil hardness of up to 9 H on the surface of various substrates or, in particular, electronic parts such as color filters and liquid crystal display panels. The method comprises: coating the surface with a liquid coating composition of which the principal ingredient is a partial cohydrolysis-condensation product of a tetraalkoxy silane, e.g., tetraethoxy silane, and a functional alkoxy silane, e.g., 3-methacryloxypropyl trimethoxy silane, and drying and heating the coating layer to effect complete curing. The hardness of the cured protective film can be increased by admixing the liquid coating composition with a finely divided inorganic filler such as a colloidal silica. It is optional that the functional alkoxy silane is subjected to the cohydrolysis reaction after it is polymerized alone or after it is copolymerized with a polyfunctional acrylic monomer.

Method for forming a protective coating film on electronic parts and

A coating solution for forming a composite metal oxide film containing: (A) at least one member selected from the group consisting of a reaction product, a partial hydrolyzate of the reaction product, and a partial acylated product of the reaction product wherein the reaction product is obtained by a reaction between at least one compound containing a carbonyl group and at least one metal compound; (B) a polyhydric alcohol compound; and (C) at least one member selected from the group consisting of a metal carboxylate compound; a metal nitrate compound; and a metal nitrite compound, which coating solution may also contain an alcohol-soluble polymer. The present invention is also directed to a process of making the same.

Coating solution for forming composite metal oxide film and process for

A coating composition for forming a composite metal oxide film containing: (A) at least one member selected from the group consisting of a reaction product, a partial hydrolyzate of the reaction product, and a partial acylated product of the reaction product wherein the reaction product is obtained by a reaction between at least one compound containing a carbonyl group and at least one metal compound; (B) a polyhydric alcohol compound; and (C) at least one member selected from the group consisting of a metal carboxylate compound; a metal nitrate compound; and a metal nitrite compound, which coating solution may also contain an alcohol-soluble polymer, and a process of making the same.

The present invention pertains to a coating solution for forming a composite metal oxide film containing:

The inventive method comprises the steps of coating the substrate surface with a coating solution containing .beta.-diketone complex of a metallic element in an aprotic polar solvent, drying and irradiating the coating film on the surface with ultraviolet light, optionally, followed by a heat treatment to form an electrically insulating oxidized metal film on the surface. By virtue of the ultraviolet irradiation, the oxidized metal film can be imparted with increased insulation even by omitting the heat treatment or by decreasing the temperature of the heat treatment so that the adverse influences on the characteristics of the substrate can be minimized.

Method for forming a film of oxidized metal

A process for the formation of a metal oxide film on a substrate by coating the substrate with a coating solution and heating the substrate to a temperature of at least 100.degree. C. The coating solution is composed of (a) a .beta.-diketone, (b) at least one element or compound selected from the group consisting of elements capable of forming complexes with said .beta.-diketone, salts of the elements and hydrolysates of alkoxides of the elements, and (c) an aprotic polar solvent. As an alternative, it is composed of a metal complex of a .beta.-diketone and an aprotic polar solvent.

Process for formation of metal oxide film

A coating solution for use in the formation of a metal oxide film is described. It is composed of (a) a .beta.-diketone, (b) at least one element or compound selected from the group consisting of elements capable of forming complexes with said .beta.-diketone, salts of the elements and hydrolysates of alkoxides of the elements, and (c) an aprotic polar solvent. As an alternative, it is composed of a metal complex of a .beta.-diketone and an aprotic polar solvent.

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Kawasaki, Japan

Katsuya Tanitsu