Patents by Inventor Kazushi OUSYUYA

Kazushi OUSYUYA 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).

  • Vitreous silica crucible for pulling of silicon single crystal and method for manufacturing the same
    Patent number: 9758901
    Abstract: The present invention provides a vitreous silica crucible which inhibits a deformation even when used under a high temperature condition for a long time, and a method for manufacturing the same. The vitreous silica crucible comprises: a substantially cylindrical straight body portion having an opening on the top end and extending in a vertical direction, a curved bottom portion, and a corner portion connecting the straight body portion with the bottom portion and a curvature of which is greater than that of the bottom portion, wherein, the vitreous silica crucible comprises a transparent layer on the inside and a bubble layer on the outside thereof, a compressive stress layer in which compressive stress remains in the inner surface side of the transparent layer, and a tensile stress layer in which tensile stress remains and is adjacent to the compressive stress layer at a gradual rate of change of stress.
    Type: Grant
    Filed: May 31, 2013
    Date of Patent: September 12, 2017
    Assignee: SUMCO CORPORATION
    Inventors: Toshiaki Sudo, Ken Kitahara, Akihiro Aiba, Kazushi Ousyuya, Fumie Yoshida, Makiko Hinooka, Eriko Kitahara, Tadahiro Sato
  • VITREOUS SILICA CRUCIBLE FOR PULLING OF SILICON SINGLE CRYSTAL AND METHOD FOR MANUFACTURING THE SAME
    Publication number: 20160108550
    Abstract: The present invention provides a vitreous silica crucible which inhibits a deformation even when used under a high temperature condition for a long time, and a method for manufacturing the same. The vitreous silica crucible comprises: a substantially cylindrical straight body portion having an opening on the top end and extending in a vertical direction, a curved bottom portion, and a corner portion connecting the straight body portion with the bottom portion and a curvature of which is greater than that of the bottom portion, wherein, the vitreous silica crucible comprises a transparent layer on the inside and a bubble layer on the outside thereof, a compressive stress layer in which compressive stress remains in the inner surface side of the transparent layer, and a tensile stress layer in which tensile stress remains and is adjacent to the compressive stress layer at a gradual rate of change of stress.
    Type: Application
    Filed: May 31, 2013
    Publication date: April 21, 2016
    Inventors: Toshiaki SUDO, Ken KITAHARA, Akihiro AIBA, Kazushi OUSYUYA, Fumie YOSHIDA, Makiko HINOOKA, Eriko KITAHARA, Tadahiro SATO