Patents by Inventor Kunizo Watanabe

Kunizo Watanabe 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).

  • Disk-shaped substrate inner circumference polishing method
    Patent number: 7959492
    Abstract: The disk-shaped substrate inner circumference polishing method for polishing an inner circumference of a disk-shaped substrate including a portion having an opening hole at the center thereof includes inserting a brush having a shaft core into the portion having the opening hole of the disk-shaped substrate; fixing one end and the other end of the brush to a pair of rotating shafts that are provided at mutually detached positions and pulling at least any one of the one end and the other end of the brush and applying tension in the axial direction to the shaft core of the brush; and rotating the brush and polishing the inner circumference of the disk-shaped substrate.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: June 14, 2011
    Assignees: Showa Denko K.K., Citizen Seimitsu Co., Ltd.
    Inventors: Kazuyuki Haneda, Kunizo Watanabe, Yosuke Sato
  • Disk-shaped substrate inner circumference polishing method
    Publication number: 20080176489
    Abstract: The disk-shaped substrate inner circumference polishing method for polishing an inner circumference of a disk-shaped substrate including a portion having an opening hole at the center thereof includes inserting a brush having a shaft core into the portion having the opening hole of the disk-shaped substrate; fixing one end and the other end of the brush to a pair of rotating shafts that are provided at mutually detached positions and pulling at least any one of the one end and the other end of the brush and applying tension in the axial direction to the shaft core of the brush; and rotating the brush and polishing the inner circumference of the disk-shaped substrate.
    Type: Application
    Filed: September 11, 2007
    Publication date: July 24, 2008
    Applicants: SHOWA DENKO K.K., CITIZEN SEIMITSU CO., LTD.
    Inventors: Kazuyuki Haneda, Kunizo Watanabe, Yosuke Sato