Patents by Inventor Yuki Hiraren

Yuki Hiraren 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).

  • Single-cystalline aluminum nitride substrate and a manufacturing method thereof
    Patent number: 9691942
    Abstract: The present invention relates to a single-crystalline aluminum nitride wherein a carbon concentration is 1×1014 atoms/cm3 or more and less than 3×1017 atoms/cm3, a chlorine concentration is 1×1014 to 1×1017 atoms/cm3, and an absorption coefficient at 265 nm wavelength is 40 cm?1 or less.
    Type: Grant
    Filed: December 22, 2011
    Date of Patent: June 27, 2017
    Assignees: National University Corporation Tokyo University of Agriculture and Technology, Tokuyama Corporation
    Inventors: Akinori Koukitu, Yoshinao Kumagai, Toru Nagashima, Yuki Hiraren
  • Single-Crystalline Aluminum Nitride Substrate and a Manufacturing Method Thereof
    Publication number: 20140346638
    Abstract: The present invention relates to a single-crystalline aluminum nitride wherein a carbon concentration is 1×1014 atoms/cm3 or more and less than 3×1017 atoms/cm3, a chlorine concentration is 1×1014 to 1×1017 atoms/cm3, and an absorption coefficient at 265 nm wavelength is 40 cm?1 or less.
    Type: Application
    Filed: December 22, 2011
    Publication date: November 27, 2014
    Applicants: TOKUYAMA CORPORATION, C/O NATIONAL UNIVERSITY CORPORATION TOKYO
    Inventors: Akinori Koukitu, Yoshinao Kumagai, Toru Nagashima, Yuki Hiraren