Patents by Inventor Taro Fujita

Taro Fujita 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).

  • Publication number: 20070160808
    Abstract: The object of the invention is to provide an anisotropic conductive sheet which obtains good conductivity without damaging a wafer of a semiconductor nor electrode terminals of a conduction measurement instrument due to loading during inspection of the wafer. An anisotropic conductive sheet 1 of the invention is formed such that a porous resin layer is formed on inner walls of a plurality of through holes perforated in the thickness direction of an electrically insulating porous sheet 2, and the surfaces of skeletons of the porous resin are coated with metal. Examples of the porous resin layer include those which are obtained by means of foaming a fluororubber or a tetrafluoroethylene-propylene copolymer rubber, having an open-cell structure, and cross-liking the same through irradiation with electron beams. The sheet is particularly favorable for a porous resin.
    Type: Application
    Filed: March 30, 2005
    Publication date: July 12, 2007
    Inventors: Yasuhiro Okuda, Taro Fujita
  • Publication number: 20060141159
    Abstract: A production process of a perforated porous resin base, comprising Step 1 of impregnating the porous structure of a porous resin base with a liquid or solution; Step 2 of forming a solid substance from the liquid or solution impregnated; Step 3 of forming a plurality of perforations extending through from the first surface of the porous resin base having the solid substance within the porous structure to the second surface in the porous resin base; and Step 4 of melting or dissolving the solid substance to remove it from the interior of the porous structure, and a production process of a porous resin base with the inner wall surfaces of the perforations made conductive, comprising the step of selectively applying a catalyst only to the inner wall surfaces of the perforations to apply a conductive metal to the inner wall surfaces.
    Type: Application
    Filed: June 4, 2004
    Publication date: June 29, 2006
    Inventors: Yasuhiro Okuda, Fumihiro Hayashi, Tsuyoshi Haga, Taro Fujita, Mayo Uenoyama, Yasuhito Masuda, Yuichi Idomoto
  • Patent number: 6887539
    Abstract: The present invention improves the concentricity after expansion process of a heat shrinkable tube which is required to have a thin wall and hardness, and further aims to obtain elongation of 100% or more in a heat aging test, copperstability test, and heat shock test. The heat shrinkable tube satisfying such aim uses a medium- or high-density polyethylene that has a molecular weight distribution (Mw/Mn) of 30 to 55, an MFR of 0.05 to 0.2, and a specific gravity of 0.94 to 0.96. A medium- or high-density polyethylene obtained by combining an ethylene-vinyl acetate copolymer, ethylene-ethylacrylate copolymer, ethylene-methylacrylate copolymer, and ethylene-ethylmethacrylate copolymer may be used. More preferably, for an antioxidant, phenol-based and sulfur-based antioxidants are used together and zinc oxide is added.
    Type: Grant
    Filed: July 17, 2002
    Date of Patent: May 3, 2005
    Assignee: Sumitomo Electric Fine Polymer, Inc.
    Inventors: Koji Muto, Taro Fujita, Shinya Nishikawa, Hiroshi Hayami
  • Patent number: 6613983
    Abstract: A foamed-polyolefin-insulated wire having a conductor diameter of 0.4 mm or less and an insulation thickness of 0.8 mm or less and satisfying, an equivalent dielectric constant less than 1.6, the fluctuation limits of the equivalent dielectric constant less than or equal to ±0.1, and conductor stripping force greater than or equal to 100 g/50 mm. Polyolefin including 10 weight % or more of an ionomer is used. Polyolefin having a swelling ratio of 55 % or more is extruded over the conductor to form a foamed insulation layer with a foaming degree of 50 % or more using a chemical foaming agent and/or an inert gas. The wire is suitable for high-speed data transmission.
    Type: Grant
    Filed: June 19, 2000
    Date of Patent: September 2, 2003
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Satoshi Shukushima, Taro Fujita, Atsushi Tsujino, Yoshihiro Hirakawa, Masato Sano, Hiroyuki Ootsuka
  • Publication number: 20030026926
    Abstract: The present invention improves the concentricity after expansion process of a heat shrinkable tube which is required to have a thin wall and hardness, and further aims to obtain elongation of 100% or more in a heat aging test, copper stability test, and heat shock test. The heat shrinkable tube satisfying such aim uses a medium- or high-density polyethylene that has a molecular weight distribution (Mw/Mn) of 30 to 55, an MFR of 0.05 to 0.2, and a specific gravity of 0.94 to 0.96. A medium- or high-density polyethylene obtained by combining an ethylene-vinyl acetate copolymer, ethylene-ethylacrylate copolymer, ethylene-methylacrylate copolymer, and ethylene-ethylmethacrylate copolymer may be used. More preferably, for an antioxidant, phenol-based and sulfur-based antioxidants are used together and zinc oxide is added.
    Type: Application
    Filed: July 17, 2002
    Publication date: February 6, 2003
    Applicant: Sumitomo Electric Fine Polymer, Inc.
    Inventors: Koji Muto, Taro Fujita, Shinya Nishikawa, Hiroshi Hayami