Patents by Inventor Yoshio Ueki

Yoshio Ueki 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).

  • Process for manufacturing semiconductor devices by implantation and diffusion
    Patent number: 4771009
    Abstract: A process for manufacturing semiconductor devices according to the present invention comprises a step for thermally oxidizing semiconductor substrates (1), (12), to form first and second oxide films (24), (25) on one main surface and on another main surface thereof, respectively; a step for selectively implanting impurity inons via said first oxide film (24) to form elements in said semiconductor substrates (1), (12); a step for successively forming a film (30) that constitutes a source of impurity diffusion and a protective film (31) on said second oxide film (25); and a step of common heat-treatment for forming predetermined diffused layers (17), (18) on said one main surface of said semiconductor substrates (1), (12) by diffusing at least one kind of the impurity ions that are implanted, and for forming a diffused layer on said another main surface of the semiconductor substrates (1), (12) by diffusing impurities contained in the film (30) that constitutes said source of impurity diffusion into said semico
    Type: Grant
    Filed: February 17, 1987
    Date of Patent: September 13, 1988
    Assignee: Sony Corporation
    Inventor: Yoshio Ueki
  • Steaming plate for rice cooker
    Patent number: D547602
    Type: Grant
    Filed: February 6, 2006
    Date of Patent: July 31, 2007
    Assignees: Sanyo Electric Co., Ltd., Tottori Sanyo Electric Co., Ltd.
    Inventors: Isamu Yamasaki, Yasumasa Yamane, Yoshio Ueki