Patents by Inventor Syunji Kuragaki

Syunji Kuragaki 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).

  • Patent number: 7491270
    Abstract: A heat shielding member 20 that thermally shields the periphery of a single crystal 16 used in a Czochralski single crystal pulling device that pulls the single crystal 16 from a melt 15 that is collected in a crucible 10 is disclosed. The heat shielding member 20 is provided with an approximately cylindrical main body portion 21 arranged so as to surround the single crystal 16, with a lower end portion thereof extending to the vicinity of the melt 15, and an approximately annular bottom plate portion 22 that extends in the diameter direction from the bottom end portion of the main body portion 21 to cover the melt. The bottom plate portion 22 is attached to the main body portion 21 in the state of being severed in the circumferential direction at at least one location. With this constitution it is possible to provide a heat shielding member with superior durability and a single crystal pulling device that employs the heat shielding member.
    Type: Grant
    Filed: October 26, 2004
    Date of Patent: February 17, 2009
    Assignee: Sumco Corporation
    Inventors: Hitoshi Sasaki, Syunji Kuragaki
  • Publication number: 20080127886
    Abstract: A heat shielding member 20 that thermally shields the periphery of a single crystal 16 used in a Czochralski single crystal pulling device that pulls the single crystal 16 from a melt 15 that is collected in a crucible 10 is disclosed. The heat shielding member 20 is provided with an approximately cylindrical main body portion 21 arranged so as to surround the single crystal 15, with a lower end portion thereof extending to the vicinity of the melt 15, and an approximately annular bottom plate portion 22 that extends in the diameter direction from the bottom end portion of the main body portion 21 to cover the melt. The bottom plate portion 22 is attached to the main body portion 21 in the state of being severed in the circumferential direction at least one location. With this constitution it is possible to provide a heat shielding member with superior durability and a single crystal pulling device that employs the heat shielding member.
    Type: Application
    Filed: October 26, 2004
    Publication date: June 5, 2008
    Applicant: SUMCO CORPORATION
    Inventors: Hitoshi Sasaki, Syunji Kuragaki