Patents by Inventor Toshimasa Akamatsu

Toshimasa Akamatsu 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: 7308999
    Abstract: A die bonding apparatus for die bonding at least two members, which are heated in a heat treatment furnace, comprising a first member having a surface to be die bonded on which solder is disposed and a second member disposed to face the first member in a state in which the solder disposed on the surface of the first member to be die bonded is interposed therebetween, and a base portion for mounting the first member thereon in a predetermined position, wherein the base portion has a temperature distribution so that a temperature of a vicinity of a central portion in a predetermined direction of the base portion is higher than that of a vicinity of an end portion of the base portion in a state in which heating is effected in the heat treatment furnace to, so that it is possible to suppress the occurrence of bubbles in the solder.
    Type: Grant
    Filed: December 19, 2003
    Date of Patent: December 18, 2007
    Assignee: Fujitsu Ten Limited
    Inventors: Toshihiko Fujii, Takashi Ohta, Shinichi Sugiura, Toshimasa Akamatsu, Katsufumi Morimune
  • Publication number: 20040129758
    Abstract: A die bonding apparatus for die bonding at least two members, which are heated in a heat treatment furnace, comprising a first member having a surface to be die bonded on which solder is disposed and a second member disposed to face the first member in a state in which the solder disposed on the surface of the first member to be die bonded is interposed therebetween, and a base portion for mounting the first member thereon in a predetermined position, wherein the base portion has a temperature distribution so that a temperature of a vicinity of a central portion in a predetermined direction of the base portion is higher than that of a vicinity of an end portion of the base portion in a state in which heating is effected in the heat treatment furnace to, so that it is possible to suppress the occurrence of bubbles in the solder.
    Type: Application
    Filed: December 19, 2003
    Publication date: July 8, 2004
    Applicant: Fujitsu Ten Limited
    Inventors: Toshihiko Fujii, Takashi Ohta, Shinichi Sugiura, Toshimasa Akamatsu, Katsufumi Morimune
  • Patent number: 6708862
    Abstract: A die bonding apparatus includes a first member having a surface to be die bonded on which solder is disposed, a base portion for mounting the first member thereon in a predetermined position, a second member disposed in an inclined manner with respect to the first member and faces the solder, and an inclination attenuating member for inclining and holding the second member with respect to the first member to attenuate an angle of inclination &thgr;1 of the second member with respect to the first member in a state where the solder is melted. In a state where the first, second members, and the solder are heated and the solder is melted, die bonding is effected while the inclination attenuating member gradually attenuates the angle of inclination &thgr;1, so that it is possible to suppress the occurrence of bubbles in the solder.
    Type: Grant
    Filed: July 31, 2002
    Date of Patent: March 23, 2004
    Assignee: Fujitsu Ten Limited
    Inventors: Toshihiko Fujii, Takashi Ohta, Shinichi Sugiura, Toshimasa Akamatsu, Katsufumi Morimune
  • Publication number: 20030024963
    Abstract: A die bonding apparatus includes a first member having a surface to be die bonded on which solder is disposed, a base portion for mounting the first member thereon in a predetermined position, a second member disposed in an inclined manner with respect to the first member and faces the solder, and an inclination attenuating member for inclining and holding the second member with respect to the first member to attenuate an angle of inclination &thgr;1 of the second member with respect to the first member in a state where the solder is melted. In a state where the first, second members, and the solder are heated and the solder is melted, die bonding is effected while the inclination attenuating member gradually attenuates the angle of inclination &thgr; 1, so that it is possible to suppress the occurrence of bubbles in the solder.
    Type: Application
    Filed: July 31, 2002
    Publication date: February 6, 2003
    Applicant: FUJITSU TEN LIMITED
    Inventors: Toshihiko Fujii, Takashi Ohta, Shinichi Sugiura, Toshimasa Akamatsu, Katsufumi Morimune