Patents by Inventor Yasuhiro Kameyama

Yasuhiro Kameyama 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).

  • Patent number: 8092981
    Abstract: A negative photoresist composition and a method of manufacturing an array substrate. The negative photoresist composition includes a photocurable composition including an ethylene unsaturated compound containing an ethylene unsaturated bond and a photopolymerization initiator, a thermosetting composition including an alkali-soluble resin crosslinked by heat and an organic solvent. The negative photoresist composition improves stability, photosensitivity, detachability after performing a developing operation and reduces residue to improve the reliability of an organic insulation layer. Furthermore, the negative photoresist composition improves the transmittance of an organic insulation layer and reduces the variation of color coordinates to improve the display quality of a display apparatus.
    Type: Grant
    Filed: December 29, 2008
    Date of Patent: January 10, 2012
    Assignees: Samsung Electronics Co., Ltd., Techno Semichem Co., Ltd.
    Inventors: Hoon Kang, Jae-Sung Kim, Yang-Ho Jung, Hi-Kuk Lee, Yasuhiro Kameyama, Yuuji Mizuho, Jong-Cheol Kim, Se-Jin Choi
  • Publication number: 20090176337
    Abstract: A negative photoresist composition and a method of manufacturing an array substrate. The negative photoresist composition includes a photocurable composition including an ethylene unsaturated compound containing an ethylene unsaturated bond and a photopolymerization initiator, a thermosetting composition including an alkali-soluble resin crosslinked by heat and an organic solvent. The negative photoresist composition improves stability, photosensitivity, detachability after performing a developing operation and reduces residue to improve the reliability of an organic insulation layer. Furthermore, the negative photoresist composition improves the transmittance of an organic insulation layer and reduces the variation of color coordinates to improve the display quality of a display apparatus.
    Type: Application
    Filed: December 29, 2008
    Publication date: July 9, 2009
    Applicants: SAMSUNG ELECTRONICS CO., LTD., TECHNO SEMICHEM CO., LTD.
    Inventors: Hoon KANG, Jae-Sung KIM, Yang-Ho JUNG, Hi-Kuk LEE, Yasuhiro KAMEYAMA, Yuuji MIZUHO, Jong-Cheol KIM, Se-Jin CHOI
  • Patent number: 6815033
    Abstract: An optical recording medium comprising a substrate and a recording layer on which recording and readout of information can be carried out by laser.
    Type: Grant
    Filed: December 6, 2002
    Date of Patent: November 9, 2004
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Takashi Miyazawa, Shuichi Maeda, Yasuhiro Kameyama
  • Publication number: 20030175468
    Abstract: An optical recording medium comprising a substrate and a recording layer on which recording and readout of information can be carried out by laser, formed on the substrate, wherein the recording layer contains a compound of the following formula [I]: 1
    Type: Application
    Filed: December 6, 2002
    Publication date: September 18, 2003
    Applicant: MITSUBISHI CHEMICAL CORPORATION
    Inventors: Takashi Miyazawa, Shuichi Maeda, Yasuhiro Kameyama
  • Patent number: 5529885
    Abstract: Disclosed are a negative photosensitive composition comprising an alkali-soluble resin, a photo acid generating system, and a crosslinking agent for the alkali-soluble resin which acts on the resin under acidic conditions, in which the crosslinking agent is a highly-alkylated alkoxymethylmelamine resin having a monomer content of from 5 to 40% by weight, and a method for forming a negative photo-resist pattern using the composition. The resist composition is stable during storage and gives good pattern profiles having high aspect ratios even though the resist film is made thick.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: June 25, 1996
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Tameichi Ochiai, Ryuichiro Takasaki, Yasuhiro Kameyama, Shichiro Takahashi
  • Patent number: 5286600
    Abstract: A negative photosensitive composition comprising (a-1) a compound having at least two organic groups of the following formula (I):--OCH.sub.2 OR.sup.1 (I)wherein R.sup.1 is an alkyl group, in its molecule and an alkali-soluble resin, or (a-2) an alkali-soluble resin having at least two organic groups of the above formula (I) in its molecule, and (b) a photo-acid-generating material.
    Type: Grant
    Filed: August 10, 1992
    Date of Patent: February 15, 1994
    Assignee: Mitsubishi Kasei Corporation
    Inventors: Tameichi Ochiai, Noriaki Takahashi, Yasuhiro Kameyama
  • Patent number: 5168030
    Abstract: Disclosed herein is an antistatic photo-resist containing an antistatic agent. Since antistatic photo-resist according to the present invention is hardly charged, it can be suitably used as a mask in implanting ions into semiconductor substrate.
    Type: Grant
    Filed: August 5, 1991
    Date of Patent: December 1, 1992
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Kasei Corporation
    Inventors: Konoe Miura, Tameichi Ochiai, Yasuhiro Kameyama, Tooru Koyama, Takashi Okabe, Tomoharu Mametani
  • Patent number: 4933257
    Abstract: Disclosed herein is an antistatic photo-resist containing an antistatic agent. Since antistatic photo-resist according to the present invention is hardly charged, it can be suitably used as a mask in implanting ions into semiconductor substrate.
    Type: Grant
    Filed: September 18, 1989
    Date of Patent: June 12, 1990
    Assignees: Mitsubishi Denki Kabushiki Kaisha, Mitsubishi Chemical Industries Limited
    Inventors: Konoe Miura, Tameichi Ochiai, Yasuhiro Kameyama, Tooru Koyama, Takashi Okabe, Tomoharu Mametani
  • Patent number: 4859563
    Abstract: Disclosed herein is a positive photoresist composition containing (a) a photosensitizer of 1,2-napthtoquinone diazides photosensitive-material comprising an ester of 2,3,4,4'-tetrahydroxybenzophenone in which on the average, not less than two hydroxyl groups of 2,3,4,4'-tetrahydroxybenzophenone have been esterified by 1,2-naphthoquinonediazide-5-sulfonic acid and (b) a novolak resin obtained by condensing a mixture of m-cresol, p-cresol and 2,5-xylenol with formaldehyde.
    Type: Grant
    Filed: March 9, 1987
    Date of Patent: August 22, 1989
    Assignee: Mitsubishi Chemical Industries Limited
    Inventors: Konoe Miura, Tameichi Ochiai, Yasuhiro Kameyama
  • Patent number: 4719167
    Abstract: Disclosed herein is a positive photoresist composition containing (a) a photosensitizer of 1,2-naphthoquinone diazides photosensitive-material comprising an ester of 2,3,4,4'-tetrahydroxybenzophenone in which on the average, not less than two hydroxy groups of 2,3,4,4'-tetrahydroxybenzophenone have been esterified by 1,2-naphthoquinonediazide-5-sulfonic acid and (b) a novolak resin obtained by condensing a mixture of m-cresol, p-cresol and 2,5-xylenol with formaldehyde.
    Type: Grant
    Filed: February 4, 1986
    Date of Patent: January 12, 1988
    Assignee: Mitsubishi Chemical Industries Ltd.
    Inventors: Konoe Miura, Tameichi Ochiai, Yasuhiro Kameyama