Patents by Inventor Sun-joong Hwang

Sun-joong Hwang 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).

  • Multi-piece ceramic crucible and method for making thereof
    Patent number: 8747554
    Abstract: A unibody, multi-piece crucible for use in for use in elemental purification, compounding, and growth of semi-conductor crystals, e.g., in the process of molecular beam epitaxy (MBE) for melting silicon and the like at high temperature. The crucible has an outer coating layer that fixedly joins the multi pieces making up the crucible. The invention also provides a method for making a unibody containing structure comprising pyrolytic boron nitride having a negative draft, which method obviates the need of complicated overhang structure of graphite mandrels or the removal of the graphite mandrels by burning at high temperatures.
    Type: Grant
    Filed: October 30, 2006
    Date of Patent: June 10, 2014
    Assignee: Momentive Performance Materials Inc.
    Inventors: Yuji Morikawa, Kazuo Kawasaki, Sun-joong Hwang, Marc Schaepkens
  • MULTI-PIECE CERAMIC CRUCIBLE AND METHOD FOR MAKING THEREOF
    Publication number: 20070289526
    Abstract: A unibody, multi-piece crucible for use in for use in elemental purification, compounding, and growth of semi-conductor crystals, e.g., in the process of molecular beam epitaxy (MBE) for melting silicon and the like at high temperature. The crucible has an outer coating layer that fixedly joins the multi pieces making up the crucible. The invention also provides a method for making a unibody containing structure comprising pyrolytic boron nitride having a negative draft, which method obviates the need of complicated overhang structure of graphite mandrels or the removal of the graphite mandrels by burning at high temperatures.
    Type: Application
    Filed: October 30, 2006
    Publication date: December 20, 2007
    Applicant: General Electric Company
    Inventors: Yuji Morikawa, Kazuo Kawasaki, Sun-joong Hwang, Marc Schaepkens