Patents by Inventor Ikunori Takada

Ikunori Takada 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).

  • Planar semiconductor device with dual conductivity insulating layers over guard rings
    Patent number: 4691224
    Abstract: A planar semiconductor device having a main p-n junction surrounded by at least one guard ring covered with an insulating layer having an opening is provided with an electrode electrically connected to said guard ring through the opening. The said electrode is provided such that it does not extend beyond the end of the guard ring region which is located in an opposite side to the main p-n junction.
    Type: Grant
    Filed: April 22, 1986
    Date of Patent: September 1, 1987
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Ikunori Takada