Patents by Inventor Takayasu Nihira
Takayasu Nihira has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 7026080Abstract: The invention provides a positive photosensitive resin composition which is free from film reduction, swelling or peeling at the time of development with an aqueous alkaline solution and which provides a dimensionally stable patterns after curing, and of which the final cured film has a low water absorption and excellent alkaline resistance. A positive photosensitive polyimide resin composition characterized by comprising an organic solvent-soluble polyimide having repeating units represented by the formula (1): (wherein m is an integer of from 3 to 10,000, R1 is a tetravalent organic group, R2 is a bivalent organic group, provided that from 5 to 100 mol % of R2 is a bivalent organic group having fluorine), a polyamic acid and a compound capable of generating an acid by irradiation with light.Type: GrantFiled: September 18, 2002Date of Patent: April 11, 2006Assignee: Nissan Chemical Industries, Ltd.Inventors: Tomonari Nakayama, Masakazu Kato, Takayasu Nihira
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Patent number: 7001705Abstract: The present invention provides a positive photosensitive resin composition which can be developed with a tetramethylammonium hydroxide aqueous solution with a usual concentration, has high sensitivity and excellent resolution, and is excellent in heat resistance, planarization properties, transparency, low water absorption or the like. Further, the present invention provides a method for arbitrarily forming a pattern having a semicircular or trapezoidal section by using the composition. The positive photosensitive resin composition of the present invention comprises an alkali-soluble resin, a 1,2-quinone diazide compound, a crosslinking compound having at least two epoxy groups and a surfactant, and the alkali-soluble resin is a copolymer comprising a carboxylic group-containing acrylic monomer, a hydroxyl group-containing acrylic monomer and an N-substituted maleimide as essential components.Type: GrantFiled: April 18, 2003Date of Patent: February 21, 2006Assignee: Nissan Chemical Industries, Ltd.Inventors: Tadashi Hatanaka, Takayasu Nihira
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Patent number: 6927012Abstract: Provided is a polyamic acid resin composition for formation of a bank, which provides excellent film characteristics and adhesion to a substrate, which can undergo patterning with use of a positive type photoresist, and which can be transformed into a polyimide after the patterning to yield a polyimide resin with upper part of film having a low surface energy. It is achieved by a polyamic acid resin composition comprising a polyamic acid [a] as a base and a polyamic acid [b] having a fluorine-containing alkyl group with a carbon number of at least 2, and containing the polyamic acid [b] in an amount of from 0.1 to 30 wt % to the total amount of the polyamic acid [a] and the polyamic acid [b].Type: GrantFiled: July 15, 2002Date of Patent: August 9, 2005Assignee: Nissan Chemical Industries, Ltd.Inventors: Tadashi Hatanaka, Sahade Daniel Antonio, Takayasu Nihira
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Publication number: 20050147914Abstract: The present invention provides a positive photosensitive resin composition which can be developed with a tetramethylammonium hydroxide aqueous solution with a usual concentration, has high sensitivity and excellent resolution, and is excellent in heat resistance, planarization properties, transparency, low water absorption or the like. Further, the present invention provides a method for arbitrarily forming a pattern having a semicircular or trapezoidal section by using the composition. The positive photosensitive resin composition of the present invention comprises an alkali-soluble resin, a 1,2-quinone diazide compound, a crosslinking compound having at least two epoxy groups and a surfactant, and the alkali-soluble resin is a copolymer comprising a carboxylic group-containing acrylic monomer, a hydroxyl group-containing acrylic monomer and an N-substituted maleimide as essential components.Type: ApplicationFiled: April 18, 2003Publication date: July 7, 2005Applicant: Nissan Chemical Industries, Ltd.Inventors: Tadashi Hatanaka, Takayasu Nihira
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Patent number: 6875554Abstract: A positive photosensitive polyimide resin composition comprising: (a) a solvent-soluble polyimide comprised of from 1 to 100 mol % of a bivalent organic group derived from a diamine, that has at least one solvent solubilizing functional group, the polyimide having a reduced viscosity ranging from 0.05 to 5.0 dl/g, (b) a photosensitive orthoquinonediazide compound, and (c) from 0.1 to 50 wt %, based on the total weight of all polymers of the composition, of a component (c1) or (c2), wherein: component (c1) is a solvent-soluble polyimide comprised of from 1 to 100 mol % of a bivalent organic group derived from a diamine, that has at least one functional group selected from the group consisting of a long chain alkyl group having at least 6 carbon atoms and a fluorinated alkyl group, the polyimide having a reduced viscosity ranging from 0.05 to 5.Type: GrantFiled: October 3, 2001Date of Patent: April 5, 2005Assignee: Nissan Chemical Industries, Ltd.Inventors: Tadashi Hatanaka, Tomonari Nakayama, Takayasu Nihira
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Patent number: 6808766Abstract: A liquid crystal alignment agent comprising a polymer having a specific unit structure, and a method for alignment of liquid crystal molecules by light irradiation without any rubbing treatment, provides liquid crystal alignment films with higher heat sensitivity, heat stability and light resistance.Type: GrantFiled: February 21, 2001Date of Patent: October 26, 2004Assignees: Nissan Chemical Industries, Ltd., Sagami Chemical Research CenterInventors: Yukihiro Miyama, Takayasu Nihira, Hideyuki Endo, Hiroyoshi Fukuro, Yu Nagase, Eiich Akiyama, Nobukatsu Nemoto
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Publication number: 20040197699Abstract: The invention provides a positive photosensitive resin composition which is free from film reduction, swelling or peeling at the time of development with an aqueous alkaline solution and which provides a dimensionally stable patterns after curing, and of which the final cured film has a low water absorption and excellent alkaline resistance.Type: ApplicationFiled: March 5, 2004Publication date: October 7, 2004Inventors: Tomonari Nakayama, Masakazu Kato, Takayasu Nihira
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Publication number: 20040175646Abstract: Provided is a polyamic acid resin composition for formation of a bank, which provides excellent film characteristics and adhesion to a substrate, which can undergo patterning with use of a positive type photoresist, and which can be transformed into a polyimide after the patterning to yield a polyimide resin with upper part of film having a low surface energy. It is achieved by a polyamic acid resin composition comprising a polyamic acid [a] as a base and a polyamic acid [b] having a fluorine-containing alkyl group with a carbon number of at least 2, and containing the polyamic acid [b] in an amount of from 0.1 to 30 wt % to the total amount of the polyamic acid [a] and the polyamic acid [b].Type: ApplicationFiled: January 26, 2004Publication date: September 9, 2004Inventors: Tadashi Hatanaka, Sahade Daniel Antonio, Takayasu Nihira
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Patent number: 6740371Abstract: An alkyldiamine having excellent polymerization reactivity, a polyimide comprising it as a constituting element, and a liquid crystal alignment film excellent in uniformity of liquid crystal alignment, are presented. Namely, the present invention relates to a diaminobenzene derivative represented by the following general formula (1) and to a polyimide obtained by reacting a diamine containing at least 1 mol % of the diaminobenzene derivative represented by the general formula (1), with at least one compound selected from a tetracarboxylic. dianhydride and its derivatives, to obtain a polyimide. precursor having a reduced viscosity of from 0.05 to 5.0 dl/g (in N-methylpyrrolidone at a temperature of 30° C., concentration: 0.5 g/dl) and ring-closing it, and having a repeating unit represented by the general formula (2). Further, the present invention relates to a liquid crystal alignment film containing at least 1 mol % of the above repeating unit.Type: GrantFiled: December 26, 2001Date of Patent: May 25, 2004Assignee: Nissan Chemical Industries, Ltd.Inventors: Kazuyoshi Hosaka, Hideyuki Nawata, Takayasu Nihira, Hideyuki Isogai, Hideyuki Endou, Hiroyoshi Fukuro
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Publication number: 20040048004Abstract: A diaminobenzene derivative represented by the formula (1): 1Type: ApplicationFiled: June 26, 2003Publication date: March 11, 2004Inventors: Kazuyoshi Hosaka, Hideyuki Nawata, Takayasu Nihira
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Publication number: 20040048188Abstract: A novel positive photosensitive resin composition is presented by improving the water repellency at the surface and imparting additional functions to a positive photosensitive resin which can be developed by an alkali aqueous solution and which is excellent in sensitivity and developability, while maintaining such properties.Type: ApplicationFiled: April 3, 2003Publication date: March 11, 2004Inventors: Tadashi Hatanaka, Tomonari Nakayama, Takayasu Nihira
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Publication number: 20040048197Abstract: A spin coatable, photosensitive black matrix coating having high surface resistivity and exhibiting an optical density greater than 3 at film thicknesses of ≦1 micron has been developed for flat panel display applications where a chrome/chrome oxide black matrix is usually employed. It possesses excellent thermal, light, and chemical stability and good shelf life. It is deposited and patterned by a simple photolithographic processes excellent thermal, light, and chemical stability and good shelf life. It is deposited and patterned by a simple photolithographic process, thereby reducing the cost of processing in relation to chrome/chrome oxide black matrix fabrication processes.Type: ApplicationFiled: September 8, 2003Publication date: March 11, 2004Inventors: Ram W. Sabnis, Jonathan W. Mayo, Terry L. Brewer, Michael D. Stroder, Kiyomi Ema, Yasuhisa Sone, Takayasu Nihira, Kazuhiro Aoba, Akira Yanagimoto
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Patent number: 6677099Abstract: A positive type photosensitive resin composition which can be developed by an aqueous alkaline solution and which is excellent in the developability and the adhesion to a substrate, is presented.Type: GrantFiled: May 30, 2002Date of Patent: January 13, 2004Assignee: Nissan Chemical Industries, Ltd.Inventors: Kazuhisa Ishii, Tomonari Nakayama, Takayasu Nihira, Hiroyoshi Fukuro
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Publication number: 20030113640Abstract: A spin coatable, photosensitive black matrix coating having high surface resistivity and exhibiting an optical density greater than 3 at film thicknesses of ≦1 micron has been developed for flat panel display applications where a chrome/chrome oxide black matrix is usually employed. It possesses excellent thermal, light, and chemical stability and good shelf life. It is deposited and patterned by a simple photolithographic processes excellent thermal, light, and chemical stability and good shelf life. It is deposited and patterned by a simple photolithographic process, thereby reducing the cost of processing in relation to chrome/chrome oxide black matrix fabrication processes.Type: ApplicationFiled: October 21, 2002Publication date: June 19, 2003Inventors: Ram W. Sabnis, Jonathan W. Mayo, Terry L. Brewer, Michael D. Stroder, Kiyomi Ema, Yasuhisa Sone, Takayasu Nihira, Kazuhiro Aoba, Akira Yanagimoto
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Publication number: 20020182522Abstract: A spin coatable, photosensitive black matrix coating having high surface resistivity and exhibiting an optical density greater than 3 at film thicknesses of ≦1 micron has been developed for flat panel display applications where a chrome/chrome oxide black matrix is usually employed. It possesses excellent thermal, light, and chemical stability and good shelf life. It is deposited and patterned by a simple photolithographic processes excellent thermal, light, and chemical stability and good shelf life. It is deposited and patterned by a simple photolithographic process, thereby reducing the cost of processing in relation to chrome/chrome oxide black matrix fabrication processes.Type: ApplicationFiled: September 5, 2001Publication date: December 5, 2002Inventors: Ram W. Sabnis, Jonathan W. Mayo, Terry L. Brewer, Michael D. Stroder, Kiyomi Ema, Yasuhisa Sone, Takayasu Nihira, Kazuhiro Aoba, Akira Yanagimoto
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Patent number: 6489431Abstract: A polyimide precursor having a repeating unit represented by the following general formula (1), wherein R1 contains a bivalent organic group constituting a diamine having a hexafluoropropylidene group in its molecule represented by the following general formula (2), and the reduced viscosity is from 0.05 to 5.0 dl/g (in N-methylpyrrolidone at a temperature of 30° C., concentration: 0.5 g/dl), and a polyimide obtained by imidizing said precursor: (wherein R1 is a bivalent organic group constituting a diamine, A is a hydrogen atom, a linear alkyl group including a methyl group, or a trifluoromethyl group, and n is the number of a substituent on an aromatic ring and an integer of from 1 to 4).Type: GrantFiled: April 12, 2001Date of Patent: December 3, 2002Assignee: Nissan Chemical Industries, Ltd.Inventors: Kazuhisa Ishii, Takayasu Nihira, Hiroyoshi Fukuro
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Patent number: 6365771Abstract: Decane compound or decene compound shown in the formula [1] below wherein A1 and A2 are independently hydrogen or (meth)acryloyl group or 2-vinyloxyethyl group; and the dotted line is single bond or double bond with the proviso that A1 and A2 are not hydrogen at the same time; and curable resin composition containing said compound therein. The compound are suitable as the photo-monomer for resist raw materials because of high clarity at short wavelength ultraviolet light, dry etching resistance, adhesive property for the substrate and high solubility in alkaline developing solution in addition to high sensitivity and greater resolution; as the monomer for optic raw materials and disk overcoat materials because of high clarity, low birefringence and low water absorption rate; and as the monomer for the coating raw materials such as EB curable coating raw materials because of high reactivity, high wear characteristics and water resistance.Type: GrantFiled: March 14, 2001Date of Patent: April 2, 2002Assignee: Nissan Chemical Industries, Ltd.Inventors: Hideo Suzuki, Takayasu Nihira, Shinichiro Takigawa
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Patent number: 6294639Abstract: The present invention relates to a treating agent for liquid crystal alignment, which comprises a polyamic acid compound having a reduced viscosity of from 0.05 to 5.0 dl/g (in N-methylpyrrolidone at a temperature of 30° C. at a concentration of 0.5 g/dl) and containing repeating units represented by the general formula [I]: (wherein R1 is a tetravalent organic group constituting a tetracarboxylic acid which has an alicyclic structure having from 2 to 5 rings condensed and wherein all the carbonyl groups are directly bonded to the alicyclic structure and said carbonyl groups are not bonded to adjacent carbon atoms in the alicyclic structure, and R2 is a bivalent organic group constituting a diamine), or a polyimide resin obtained by imidizing said polyamic acid compound, and a liquid crystal alignment film and a liquid crystal device employing it.Type: GrantFiled: June 2, 2000Date of Patent: September 25, 2001Assignee: Nissan Chemical Industries, Ltd.Inventors: Kiyoshi Sawahata, Hideyuki Nawata, Takayasu Nihira, Yoshikazu Ohtsuka, Yasuyuki Nakajima
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Patent number: 6274695Abstract: The present invention relates to a treating agent for liquid crystal alignment, which is an agent for liquid crystal alignment to be used for a method in which polarized ultraviolet rays or electron rays are irradiated on a polymer thin film formed on a substrate in a predetermined direction relative to the substrate plane, and said substrate is used for aligning liquid crystal without rubbing treatment, wherein said agent for liquid crystal alignment contains a polymer compound having photochemically reactive groups in the polymer main chain and a glass transition temperature of at least 200° C.Type: GrantFiled: November 1, 1999Date of Patent: August 14, 2001Assignee: Nissan Chemical Industries, Ltd.Inventors: Hideyuki Endou, Takayasu Nihira, Hiroyoshi Fukuro
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Patent number: 6111059Abstract: A diaminobenzene derivative represented by formula (1), and a polyimide obtained by reacting a diamine containing at least 1 mol % of said diaminobenzene derivative, with a tetracarboxylic acid and its derivatives to obtain a polyimide precursor and ring-closing it, having a repeating unit represented by formula (2), and a liquid crystal alignment film containing said polyimide. ##STR1## P is a single bond or --O--, --COO--, or --CONH--, Q is a cyclic substituent selected from an aromatic ring, an aliphatic ring, a hetero ring and their substitution products, R.sup.1 is an aliphatic ring, and R.sup.2 is C.sub.1-22 straight chain alkyl group, A is a tetravalent organic group constituting a tetracarboxylic acid, B is a bivalent organic group constituting a diamine.Type: GrantFiled: August 12, 1998Date of Patent: August 29, 2000Assignee: Nissan Chemical Industries, Ltd.Inventors: Takayasu Nihira, Hideyuki Nawata, Hiroyoshi Fukuro