Patents by Inventor Yoshiji Kasai

Yoshiji Kasai 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).

  • Circuit board for a semiconductor device and method of making the same
    Patent number: 6239381
    Abstract: In the circuit board of the present invention, a base board has a first face and a second face, in which a plurality of sets of wire patterns, to which semiconductor chips are respectively connected, are printed on the first face. A metal plate for radiating heat is fixed on the second face of the base board. The base board includes a V-notch being formed along a border between the sets of wire patterns, and the metal plate includes a V-notch being formed to correspond to the V-notch of the base board, whereby the circuit board is divided into a plurality of circuit units, which are mutually connected by a thin section corresponding to the V-notches of the metal plate.
    Type: Grant
    Filed: June 10, 1998
    Date of Patent: May 29, 2001
    Assignee: Kabushiki Kaisha Eastern
    Inventors: Yoshiji Kasai, Kaoru Hära, Misao Aruga
  • Circuit board for a semiconductor device and method of making the same
    Patent number: 5824964
    Abstract: In the circuit board of the present invention, a base board has a first face and a second face, in which a plurality of sets of wire patterns, to which semiconductor chips are respectively connected, are printed on the first face. A metal plate for radiating heat is fixed on the second face of the base board. The base board includes a V-notch being formed along a border between the sets of wire patterns, and the metal plate includes a V-notch being formed to correspond to the V-notch of the base board, whereby the circuit board is divided into a plurality of circuit units, which are mutually connected by a thin section corresponding to the V-notches of the metal plate.
    Type: Grant
    Filed: April 11, 1997
    Date of Patent: October 20, 1998
    Assignee: Kabushiki Kaisha Eastern
    Inventors: Yoshiji Kasai, Kaoru Hara, Misao Aruga