Patents by Inventor Koichi Tsurusako

Koichi Tsurusako 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).

  • Electric power semiconductor device
    Patent number: 6984884
    Abstract: A main lead (2) is a single body comprised of an inner lead (2a) and an outer lead (2b) which are integrally formed, the bonding wires are arranged in parallel and fixed onto the inner lead (2a) by the wire bonding portions (3b), and the outer lead are exposed from the mold resin to the outside for electrical connection, and a plurality of through holes (8) penetrating the main terminal lead are formed in the outer vicinity of the wire bonding portions (3b) within the inner lead (2a), and the through holes are arranged substantially in parallel to the arrangement direction of the wire bonding portions (3b) so as to correspond to the entire wire bonding portions (3b).
    Type: Grant
    Filed: May 3, 2004
    Date of Patent: January 10, 2006
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masao Kikuchi, Dai Nakajima, Koichi Tsurusako, Kunihiro Yoshihara
  • Electric power semiconductor device
    Publication number: 20040251528
    Abstract: A main lead (2) is a single body comprised of an inner lead (2a) and an outer lead (2b) which are integrally formed, the bonding wires are arranged in parallel and fixed onto the inner lead (2a) by the wire bonding portions (3b), and the outer lead are exposed from the mold resin to the outside for electrical connection, and a plurality of through holes (8) penetrating the main terminal lead are formed in the outer vicinity of the wire bonding portions (3b) within the inner lead (2a), and the through holes are arranged substantially in parallel to the arrangement direction of the wire bonding portions (3b) so as to correspond to the entire wire bonding portions (3b).
    Type: Application
    Filed: May 3, 2004
    Publication date: December 16, 2004
    Applicant: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masao Kikuchi, Dai Nakajima, Koichi Tsurusako, Kunihiro Yoshihara