Patents by Inventor Akiko Hatanaka

Akiko Hatanaka 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).

  • Resin encapsulation type semiconductor device
    Patent number: 4617584
    Abstract: There is disclosed a highly reliable resin encapsulation type semiconductor device excellent humidity resistance as well as high temperature electric characteristics. The specific feature consists in the epoxy resin composition employed for encapsulation. This composition comprises a novolac type epoxy resin, a novolac type phenol resin, an organic phosphine compound and an organic phosphorus acid compound.The resin encapsulation type semiconductor device is markedly small in leak current under hot an humid conditions and has a prolonged life due to difficult deterioration through corrosion of electrodes and aluminum wiring, as compared with those of prior art.
    Type: Grant
    Filed: March 28, 1983
    Date of Patent: October 14, 1986
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Hirotoshi Ikeya, Akiko Hatanaka
  • Resin encapsulation type semiconductor device
    Patent number: 4572853
    Abstract: There is presented a highly reliable resin encapsulation type semiconductor device excellent in humidity resistance as well as high temperature electrical characteristics. The specific feature consists in the epoxy resin composition employed for encapsulation. This composition comprises an epoxy resin, a novolac resin as curing agent and an organic tertiary phosphine compound as curing accelerator. The resin encapsulation type semiconductor device is markedly small in leak current under hot and humid conditions and has a prolonged life due to difficult deterioration through corrosion of electrodes and aluminum wiring, as compared with those of prior art.
    Type: Grant
    Filed: February 21, 1984
    Date of Patent: February 25, 1986
    Assignee: Tokyo Shibaura Denki Kabushiki Kaisha
    Inventors: Hirotoshi Ikeya, Shuichi Suzuki, Takayuki Oguni, Kazutaka Matsumoto, Akiko Hatanaka