Patents Assigned to Kogyo Gizyutsuin
  • Semiconductor nonvolatile memory
    Patent number: 4821236
    Abstract: A floating gate type semiconductor non-volatile memory injects carriers from a carrier supply region to a floating gate by a phenomenon called "punch-through" injection in which a space charge region is formed in a semiconductor substrate between the carrier supply region and a carrier injection region so as to accelerate the carriers and inject them into the floating gate without forwardly biasing the carrier injection region or the substrate.
    Type: Grant
    Filed: February 9, 1987
    Date of Patent: April 11, 1989
    Assignees: Kogyo Gizyutsuin, Seiko Instruments & Electronics Ltd.
    Inventors: Yutaka Hayashi, Yoshikazu Kojima, Masaaki Kamiya, Kojiro Tanaka