Patents by Inventor Kenzo Takemura

Kenzo Takemura 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: 8273458
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: September 25, 2012
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Itsuo Watanabe, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Patent number: 8273457
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: September 25, 2012
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Itsuo Watanabe, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Patent number: 8252419
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Grant
    Filed: June 22, 2011
    Date of Patent: August 28, 2012
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Itsuo Watanabe, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Publication number: 20110247867
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 13, 2011
    Inventors: Itsuo WATANABE, Kenzo TAKEMURA, Akira NAGAI, Kazuhiro ISAKA, Osamu WATANABE, Kazuyoshi KOJIMA
  • Publication number: 20110247874
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 13, 2011
    Inventors: Itsuo WATANABE, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Publication number: 20110247873
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Application
    Filed: June 22, 2011
    Publication date: October 13, 2011
    Inventors: Itsuo WATANABE, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Patent number: 7879445
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Grant
    Filed: February 6, 2007
    Date of Patent: February 1, 2011
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Itsuo Watanabe, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Publication number: 20090314533
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Application
    Filed: August 28, 2009
    Publication date: December 24, 2009
    Inventors: Itsuo Watanabe, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Patent number: 7247381
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing 100 parts by weight of an adhesive resin composition and 10 to 200 parts by weight of an adhesive resin composition and 10 to 200 parts by weight of an inorganic filler, a circuit board in which the circuit members are bonded together with the adhesive, and a method of producing the circuit board.
    Type: Grant
    Filed: August 13, 1998
    Date of Patent: July 24, 2007
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Itsuo Watanabe, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Publication number: 20070137887
    Abstract: An adhesive for bonding and securing a semiconductor chip to a circuit board and electrically connecting the electrodes of the two, and containing an adhesive resin composition and an inorganic filler being contained in an amount of 10 to 200 parts by weight of 100 parts by weight of the adhesive resin composition.
    Type: Application
    Filed: February 6, 2007
    Publication date: June 21, 2007
    Inventors: Itsuo Watanabe, Kenzo Takemura, Akira Nagai, Kazuhiro Isaka, Osamu Watanabe, Kazuyoshi Kojima
  • Patent number: 6338195
    Abstract: A connection sheet which firmly bonds electrodes that face each other together by interposing the connection sheet between the electrodes. The connection sheet comprises a first adhesive layer containing a first adhesive having an insulating property and a second adhesive layer containing a second adhesive having an insulating property and a conductive material and placed at least on one side of the first adhesive layer. At the same time of electrode connection, the second adhesive molten has a viscosity equal to or lower than that of the first adhesive when molten. When the electrodes are connected with this structure, the conductive material contained in the second adhesive layer is embedded in the first adhesive layer having relatively high melting viscosity, and part of the conductive material is trapped on the electrodes to be connected in contact therewith. Accordingly, the conductive material can be securely held between the electrodes.
    Type: Grant
    Filed: December 27, 1999
    Date of Patent: January 15, 2002
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Isao Tsukagoshi, Yukihisa Hirosawa, Kouji Kobayashi, Tomohisa Ohta, Hiroshi Matsuoka, Itsuo Watanabe, Kenzo Takemura, Naoyuki Shiozawa, Osamu Watanabe, Kazuyoshi Kojima
  • Patent number: 6328844
    Abstract: A heat-active adhesive for a connecting circuit which is used for electrically connecting circuit electrodes facing each other in the pressing direction by heating and pressing the electrodes. The adhesive has an elastic modulus of 100-2,000 MPa at 40° C. after adhesion. The adhesive can contain at least an epoxy resin, acrylic rubber, and a latent curing agent. An acrylic rubber having a glycidryl ether group as a molecule is preferably used as the acrylic rubber.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: December 11, 2001
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Itsuo Watanabe, Kenzo Takemura, Osamu Watanabe, Naoyuki Shiozawa, Akira Nagai, Kazuyoshi Kojima, Toshiaki Tanaka, Kazunori Yamamoto
  • Patent number: 6223429
    Abstract: To provide a highly reliable semiconductor device structure that enables cost reduction in the production of packages, inclusive of the cost for chips, and may cause less changes in connection resistance even under conditions of a long-term environmental resistance test. In a semiconductor device comprising a semiconductor chip face-down bonded to a wiring board, it has a structure wherein projecting metal portions are provided at the opposing wiring board terminals without forming bumps on bonding pads of the chip, the whole chip surface is bonded with an organic, anisotropic conductive adhesive material, and the whole or at least an edge of the back of the chip is covered with a sealing material.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: May 1, 2001
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Aizou Kaneda, Masaaki Yasuda, Itsuo Watanabe, Tomohisa Ohta, Fumio Inoue, Yoshiaki Tsubomatsu, Toshio Yamazaki, Hiroto Ohata, Kenzo Takemura, Akira Nagai, Osamu Watanabe, Naoyuki Shiozawa, Kazuyoshi Kojima, Toshiaki Tanaka, Kazunori Yamamoto
  • Patent number: 6184577
    Abstract: In regard to a packaging substrate on which a semiconductor chip is mounted, the surface copper foil of a double-sided copper-clad glass epoxy resin laminated sheet is subjected to circuit formation and inner-layer bonding, then an epoxy resin adhesive film with copper foil is bonded to the surface of the inner-layer circuit by press lamination, and a through hole is formed through the sheet, followed by electroless copper plating, outer-layer circuit formation by the subtractive process, and solder coating to obtain the packaging substrate. The bump electrode of the semiconductor chip and the packaging substrate are connected through an adhesive film.
    Type: Grant
    Filed: August 30, 1999
    Date of Patent: February 6, 2001
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Kenzo Takemura, Itsuo Watanabe, Akira Nagai, Osamu Watanabe, Kazuyoshi Kojima, Akishi Nakaso, Kazunori Yamamoto, Yoshiyuki Tsuru, Teiichi Inada, Yasushi Shimada
  • Patent number: 6034331
    Abstract: A connection sheet which firmly bonds electrodes that face each other together by interposing the connection sheet between the electrodes. The connection sheet comprises a first adhesive layer containing a first adhesive having an insulating property and a second adhesive layer placed at least on one side of the first adhesive layer and containing a second adhesive having an insulating property and a conductive material, wherein at the time of electrode connection, the second adhesive molten has a viscosity equal to or lower than that of the first adhesive when molten. When the electrodes are connected with this structure, the conductive material contained in the second adhesive layer is embedded in the first adhesive layer having relatively high melting viscosity, and part of the conductive material is trapped on the electrodes to be connected in contact therewith. Accordingly, the conductive material can be securely held between the electrodes.
    Type: Grant
    Filed: July 23, 1996
    Date of Patent: March 7, 2000
    Assignee: Hitachi Chemical Company, Ltd.
    Inventors: Isao Tsukagoshi, Yukihisa Hirosawa, Kouji Kobayashi, Tomohisa Ohta, Hiroshi Matsuoka, Itsuo Watanabe, Kenzo Takemura, Naoyuki Shiozawa, Osamu Watanabe, Kazuyoshi Kojima