Patents by Inventor Toshirou Umeki

Toshirou Umeki 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: 7413609
    Abstract: A semiconductor single crystal manufacturing apparatus capable of lowering the local deterioration of a wire under high temperature atmosphere in the furnace of a chamber, wherein a crucible (24) in which silicon melt (28) is filled is installed in the furnace of the chamber (22), a pull-chamber (23) is disposed above the chamber (22), and a seed holder (32) lifting between the inside of the pull-chamber (23) and the inside of the furnace is suspended by a wire (50) through a coupling member (31). A collar (52) is fitted to the wire (50) so that, when the seed holder (32) is positioned to touch the melt, the exposed portion of the wire (50) near the tip thereof becomes a specified temperature or below under the high temperature atmosphere in the furnace.
    Type: Grant
    Filed: October 13, 2004
    Date of Patent: August 19, 2008
    Assignee: Sumco Techxiv Corporation
    Inventor: Toshirou Umeki
  • Publication number: 20070051303
    Abstract: A semiconductor single crystal manufacturing apparatus capable of lowering the local deterioration of a wire under high temperature atmosphere in the furnace of a chamber, wherein a crucible (24) in which silicon melt (28) is filled is installed in the furnace of the chamber (22), a pull-chamber (23) is disposed above the chamber (22), and a seed holder (32) lifting between the inside of the pull-chamber (23) and the inside of the furnace is suspended by a wire (50) through a coupling member (31). A collar (52) is fitted to the wire (50) so that, when the seed holder (32) is positioned to touch the melt, the exposed portion of the wire (50) near the tip thereof becomes a specified temperature or below under the high temperature atmosphere in the furnace.
    Type: Application
    Filed: October 13, 2004
    Publication date: March 8, 2007
    Applicant: Komatsu Denshi Kinzoku Kabushiki Kaisha
    Inventor: Toshirou Umeki