Patents by Inventor Masami Tomono

Masami Tomono 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).

  • Discrete semiconductor device having polymer resin as insulator and method for making the same
    Patent number: 4017886
    Abstract: Disclosed is a discrete semiconductor device comprising a Si body having an emitter region, a base region and a collector region, an SiO.sub.2 layer disposed on the surface of the body, a polyimide resin having a thickness of 5 .mu. disposed on the SiO.sub.2 layer, electrodes penetrating through the SiO.sub.2 layer and the polyimide resin thereby contacting the emitter region and the base region, respectively and extending on the surface of the polyimide resin, whereby it becomes easy to bond a wire connected to an external electrode with the electrodes.
    Type: Grant
    Filed: May 16, 1975
    Date of Patent: April 12, 1977
    Assignee: Hitachi, Ltd.
    Inventors: Masami Tomono, Akira Abe, Seiki Harada, Kikuji Sato, Takeshi Takagi, Genichi Kamoshita, Yuichiro Oya, Atsushi Saiki