Patents by Inventor Tadashi Kusanagi

Tadashi Kusanagi 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).

  • Device for cooling semiconductor elements
    Patent number: 4546409
    Abstract: A device for cooling semiconductor elements is constituted by a plate for cooling semiconductor elements, the plate being made of aluminum or an aluminum alloy, and a semiconductor element-mounting sheet which is made of aluminum or an aluminum alloy, the sheet having on one surface thereof a metal layer to which solder can be applied as desired, and the other surface of the sheet being secured by ultrasonic welding to the plate in a recessed portion formed in the cooling plate by ultrasonic welding.
    Type: Grant
    Filed: March 25, 1983
    Date of Patent: October 8, 1985
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Souichi Yoshino, Tadashi Kusanagi, Masakazu Mori