Patents by Inventor Yuriko Kaito

Yuriko Kaito 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).

  • Reformed aluminum nitride sintered body and method of producing the same
    Patent number: 8703041
    Abstract: [Problems] To provide a method of producing, easily and in a high yield, a reformed aluminum nitride sintered body having very excellent light transmission property which can be favorably used as a light-transmitting cover particularly for light sources having high luminous efficiencies. [Means for Solution] An aluminum nitride sintered body having a concentration of metal impurities excluding aluminum of not more than 150 ppm, an oxygen concentration of not more than 0.5% by weight and a relative density of not less than 95% is used as a starting material. The aluminum nitride sintered body is heat-treated in an oxidizing atmosphere in a temperature region of 1400 to 2000° C. to increase the oxygen concentration by not less than 0.03% by weight.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: April 22, 2014
    Assignee: Tokuyama Corporation
    Inventors: Yuriko Kaito, Yukihiro Kanechika, Masanobu Azuma
  • REFORMED ALUMINUM NITRIDE SINTERED BODY AND METHOD OF PRODUCING THE SAME
    Publication number: 20100183860
    Abstract: [Problems] To provide a method of producing, easily and in a high yield, a reformed aluminum nitride sintered body having very excellent light transmission property which can be favorably used as a light-transmitting cover particularly for light sources having high luminous efficiencies. [Means for Solution] An aluminum nitride sintered body having a concentration of metal impurities excluding aluminum of not more than 150 ppm, an oxygen concentration of not more than 0.5% by weight and a relative density of not less than 95% is used as a starting material. The aluminum nitride sintered body is heat-treated in an oxidizing atmosphere in a temperature region of 1400 to 2000° C. to increase the oxygen concentration by not less than 0.03% by weight.
    Type: Application
    Filed: September 2, 2008
    Publication date: July 22, 2010
    Inventors: Yuriko Kaito, Yukihiro Kanechika, Masanobu Azuma