Patents by Inventor Touichi Sakata

Touichi Sakata 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: 7560307
    Abstract: There are disclosed a resin composition comprising (A) a heat-resistant resin soluble in a solvent at room temperature, (B) a heat-resistant resin which is insoluble in a solvent at room temperature but becomes soluble by heating, and (C) a solvent; a heat-resistant resin paste further containing (D) particles or liquid state material D showing rubber elasticity; and a semiconductor device using the same and a method for producing the same.
    Type: Grant
    Filed: April 14, 2006
    Date of Patent: July 14, 2009
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Yasuhiro Yano, Hidekazu Matsuura, Yoshihiro Nomura, Yoshii Morishita, Touichi Sakata, Hiroshi Nishizawa, Toshiaki Tanaka, Masaaki Yasuda, Aizou Kaneda
  • Publication number: 20060180908
    Abstract: There are disclosed a resin composition comprising (A) a heat-resistant resin soluble in a solvent at room temperature, (B) a heat-resistant resin which is insoluble in a solvent at room temperature but becomes soluble by heating, and (C) a solvent; a heat-resistant resin paste further containing (D) particles or liquid state material D showing rubber elasticity; and a semiconductor device using the same and a method for producing the same.
    Type: Application
    Filed: April 14, 2006
    Publication date: August 17, 2006
    Inventors: Yasuhiro Yano, Hidekazu Matsuura, Yoshihiro Nomura, Yoshii Morishita, Touichi Sakata, Hiroshi Nishizawa, Toshiaki Tanaka, Masaaki Yasuda, Aizou Kaneda
  • Patent number: 7061081
    Abstract: There are disclosed a resin composition comprising (A) a heat-resistant resin soluble in a solvent at room temperature, (B) a heat-resistant resin which is insoluble in a solvent at room temperature but becomes soluble by heating, and (C) a solvent; a heat-resistant resin paste further containing (D) particles or liquid state material D showing rubber elasticity; and a semiconductor device using the same and a method for producing the same.
    Type: Grant
    Filed: March 6, 2001
    Date of Patent: June 13, 2006
    Assignee: Hitachi Chemical Co., Ltd.
    Inventors: Yasuhiro Yano, Hidekazu Matsuura, Yoshihiro Nomura, Yoshii Morishita, Touichi Sakata, Hiroshi Nishizawa, Toshiaki Tanaka, Masaaki Yasuda, Aizou Kaneda
  • Publication number: 20030082925
    Abstract: There are disclosed a resin composition comprising (A) a heat-resistant resin soluble in a solvent at room temperature, (B) a heat-resistant resin which is insoluble in a solvent at room temperature but becomes soluble by heating, and (C) a solvent; a heat-resistant resin paste further containing (D) particles or liquid state material D showing rubber elasticity; and a semiconductor device using the same and a method for producing the same.
    Type: Application
    Filed: September 6, 2002
    Publication date: May 1, 2003
    Inventors: Yasuhiro Yano, Hidekazu Matsuura, Yoshihiro Nomura, Yoshii Morishita, Touichi Sakata, Hiroshi Nishizawa, Toshiaki Tanaka, Masaaki Yasuda, Aizou Kaneda
  • Patent number: 6372859
    Abstract: A thermoresistance adhesive which does not dissolve in the sealer-composing resins at the sealer molding temperature and is capable of providing a semiconductor chip/lead frame adhesive strength under shear of 1 N/4 mm2 or greater, and including, for example, amide, imide, ester or ether linkage is suited for use in producing thermoresistance adhesive solutions and thermoresistance resin pastes, and the semiconductor chips, lead frames, films, etc., made by using such an adhesive are suited for providing low-cost semiconductor devices.
    Type: Grant
    Filed: November 26, 1999
    Date of Patent: April 16, 2002
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Touichi Sakata, Hiroshi Nishizawa, Keizo Hirai, Kenji Suzuki
  • Patent number: 4791157
    Abstract: A polyetheramide-imide polymer composition comprising an aromatic polyetheramide-imide polymer obtained by reacting trimellitic acid or a derivative thereof with a special aromatic diamine having ether linkages, and an ether compound and/or an alicyclic ketone compound as a solvent is excellent in film-forming properties at low temperatures.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: December 13, 1988
    Assignee: Hitachi Chemical Co.
    Inventors: Hiroshi Nishizawa, Touichi Sakata, Yoshiyuki Mukoyama
  • Patent number: 4530975
    Abstract: A polyamide-imide resin composition comprising (A) a polyamide-imide resin modified with a polyisocyanate containing one or more isocyanurate rings and a lactam and (B) at least one member selected from the group consisting of (i) an alkoxy modified amino resin, (ii) a polyisocyanate containing one or more isocyanurate rings, (iii) a phenol-formaldehyde resin, (iv) an epoxy resin, (v) a polyester resin having one or more hydroxyl groups obtained by using terephthalic acid and/or isophthalic acid as an acid component, and (vi) a metal salt of Sn, Mn, Co or Zn, can give fast curing properties to the resin composition without lowering heat resistance, flexibility, abrasion resistance and also giving good surface appearance to the coating.
    Type: Grant
    Filed: September 30, 1982
    Date of Patent: July 23, 1985
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Yoshiyuki Mukoyama, Touichi Sakata, Yuichi Osada
  • Patent number: 4294952
    Abstract: A polyamide-imide resin obtained by reacting in a cresol type solvent a polyisocyanate containing isocyanurate rings, an aromatic diisocyanate, a lactam and a polycarboxylic acid containing at least one acid anhydride group, said polyisocyanate being used in an amount of 1 to 30 equivalent % and said lactam in an amount of 20 to 80 equivalent % each based on the total isocyanate equivalent can give a resin composition or a varnish suitable for coating, particularly for producing insulated wire excellent in heat resistance, flexibility, resistance to Freon, wear resistance, and the like.
    Type: Grant
    Filed: November 16, 1979
    Date of Patent: October 13, 1981
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Yoshiyuki Mukoyama, Touichi Sakata