Patents by Inventor Hiroshi Harigaya

Hiroshi Harigaya 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).

  • Semiconductor devices and methods of manufacturing same
    Patent number: 3942241
    Abstract: A gate self-alignment type field-effect semiconductor device is formed with an insulating film deposited on the surface of a substrate. A polycrystal silicon doped with impurities having a type of conductivity opposite to the conductivity of the substrate extends through a gap in said insulating film to engage the surface of said substrate so as to serve as both a diffusion source and electrode for each of the source and drain of the device.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: March 9, 1976
    Assignee: Kabushiki Kaisha Suwa Seikosha
    Inventors: Hiroshi Harigaya, Toshio Kano, Eishi Aizawa