Patents Examined by Naathan Van Sell
  • Handle substrates of composite substrates for semiconductors
    Patent number: 9676670
    Abstract: A handle substrate is composed of a translucent alumina sintered body containing a sintering aid including at least magnesium. A concentration of magnesium at a bonding face of the handle substrate to a donor substrate is half or less of an average concentration of magnesium of the handle substrate.
    Type: Grant
    Filed: September 8, 2015
    Date of Patent: June 13, 2017
    Assignee: NGK INSULATORS, LTD.
    Inventor: Sugio Miyazawa