Patents by Inventor Yutaka Morita

Yutaka Morita 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).

  • Method of making plastic encapsulated semiconductor devices
    Patent number: 4283838
    Abstract: The present invention provides a plastic encapsulated semiconductor device which comprises a connected metal plate having a plurality of semiconductor element holding parts which are connected in series in one direction with at least two connecting arms, said connecting arms having sectional area smaller than that of said semiconductor element holding part and being disposed inside of the side surface of said semiconductor element holding parts in the connecting direction.The invention provides a method of preparing semiconductor devices having relatively large current capacity of about 5 to 50 amperes used as diodes for automobiles and having high quality in the mass production.
    Type: Grant
    Filed: February 12, 1979
    Date of Patent: August 18, 1981
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Masahiro Yamane, Toshimi Watanabe, Keiji Itoga, Kiyoshi Ishibashi, Yutaka Morita, Isamu Yamamoto, Kiyoji Imanaka