Patents by Inventor Ryoichi Nishimizu

Ryoichi Nishimizu 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).

  • Composite structure
    Patent number: 7897268
    Abstract: According to the present invention, a structure made of yttrium oxide is formed on a surface of a substrate comprises yttrium oxide polycrystals as a main component, a boundary layer made of hyaline does not substantially exist on a boundary face between crystals which form the structure, and both a cubic system and a monoclinic system exist in the crystal system of the yttrium oxide polycrystals. With this, it is possible to adjust the hardness of the structure made of yttrium oxide formed on a surface of a substrate to be larger than that of an yttrium oxide sintered body.
    Type: Grant
    Filed: October 10, 2006
    Date of Patent: March 1, 2011
    Assignee: Toto Ltd.
    Inventors: Junichi Iwasawa, Ryoichi Nishimizu, Hironori Hatono, Hiroaki Ashizawa
  • Composite Structure
    Publication number: 20090233126
    Abstract: According to the present invention, a structure made of yttrium oxide is formed on a surface of a substrate comprises yttrium oxide polycrystals as a main component, a boundary layer made of hyaline does not substantially exist on a boundary face between crystals which form the structure, and both a cubic system and a monoclinic system exist in the crystal system of the yttrium oxide polycrystals. With this, it is possible to adjust the hardness of the structure made of yttrium oxide formed on a surface of a substrate to be larger than that of an yttrium oxide sintered body.
    Type: Application
    Filed: October 10, 2006
    Publication date: September 17, 2009
    Inventors: Junichi Iwasawa, Ryoichi Nishimizu, Hironori Hatono, Hiroaki Ashizawa
  • Electrostatic Chuck, Manufacturing method thereof and substrate treating apparatus
    Publication number: 20080276865
    Abstract: An electrostatic chuck includes: a mounting surface on which a workpiece is to be mounted, the mounting surface including a polycrystalline structure formed by aerosol deposition, the polycrystalline structure having a protrusion on its surface. At least the protrusion contains yttria (Y2O3).
    Type: Application
    Filed: November 29, 2007
    Publication date: November 13, 2008
    Applicant: Toto Ltd.
    Inventors: Ryoichi Nishimizu, Hironori Hatono, Akihiko Matsumura