Patents by Inventor Shozo Muraoka

Shozo Muraoka 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).

  • Methods for holding and pulling single crystal
    Patent number: 5871578
    Abstract: Oscillation of a growing crystal is suppressed in a Czochralski method when part of the growing crystal is mechanically held. Methods for holding and pulling a single crystal in a Czochralski method, wherein a seed crystal is pulled while rotating after the seed crystal is contacted with a raw material melt, part of the growing single crystal is mechanically held during pulling and the single crystal of heavy weight can be pulled regardless of mechanical strengths of the seed crystal or a neck portion thereof, wherein the raw material melt is under application of a magnetic field thereto when the growing crystal is mechanically held.
    Type: Grant
    Filed: August 20, 1997
    Date of Patent: February 16, 1999
    Assignee: Shin-Etsu Handotai Co., Ltd.
    Inventors: Eiichi Iino, Makoto Iida, Masanori Kimura, Shozo Muraoka