Patents by Inventor Tatsuji Oda

Tatsuji Oda 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).

  • Method for making multilayer wiring structure
    Patent number: 6043145
    Abstract: In a method for making a multilayer wiring structure, a second insulating film having an etching rate slower than a first insulating film is provided on the first insulating film covering a wiring pattern; an opening is formed in the second insulating film in a portion corresponding to a connecting hole to be formed afterwards; a third insulating film having an etching rate faster than the second insulating film is provided on the opening and the second insulating film; a groove is formed, so as to expose the opening, in the third insulating film in a portion where an upper-layer wiring pattern is formed, and the connecting hole reaching the wiring pattern is formed; and a connecting plug is formed by packing a conductive material in the connecting hole, and the upper-layer wiring pattern is formed by packing a conductive material in the groove.
    Type: Grant
    Filed: March 7, 1997
    Date of Patent: March 28, 2000
    Assignee: Sony Corporation
    Inventors: Toshiharu Suzuki, Keiichi Maeda, Kazuhide Koyama, Tatsuji Oda
  • Laser device formed with a stripe light emission region
    Patent number: 4608695
    Abstract: A semiconductor laser device having a stripe light emission region formed in an active layer, a bent portion formed in the active layer on a light end portion of the light emission region in a range of approximately the width of the light emission region, and a flat portion formed in the active layer the width of which is made larger than that of the light emission region inside of the end portion of the light emission region.
    Type: Grant
    Filed: September 26, 1983
    Date of Patent: August 26, 1986
    Assignee: Sony Corporation
    Inventors: Tatsuji Oda, Takayoshi Mamine, Osamu Yoneyama