Patents by Inventor Jung-Tu Chiu

Jung-Tu Chiu 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).

  • Semiconductor light-emitting device and manufacturing method thereof
    Patent number: 7615773
    Abstract: A semiconductor light-emitting device comprises a substrate; and an active layer formed over the substrate comprising a well layer having an unintentionally-doped impurities; a first barrier layer; and a second barrier layer, wherein the well layer is disposed between the first barrier layer and the second barrier layer, the first barrier layer comprises an n-type-impurities-intentionally-doped portion near to the well layer, and an n-type-impurities-unintentionally-doped portion distant from the well layer; the second barrier layer comprises an n-type-impurities-unintentionally-doped portion near to the well layer.
    Type: Grant
    Filed: December 29, 2006
    Date of Patent: November 10, 2009
    Assignee: Epistar Corporation
    Inventors: Shih-Nan Yen, Jung-Tu Chiu, Yu-Jiun Shen, Ching-Fu Tsai
  • Semiconductor light-emitting device and manufacturing method thereof
    Publication number: 20070152207
    Abstract: A semiconductor light-emitting device comprises a substrate; and an active layer formed over the substrate comprising a well layer having an unintentionally-doped impurities; a first barrier layer; and a second barrier layer, wherein the well layer is disposed between the first barrier layer and the second barrier layer, the first barrier layer comprises an n-type-impurities-intentionally-doped portion near to the well layer, and an n-type-impurities-unintentionally-doped portion distant from the well layer; the second barrier layer comprises an n-type-impurities-unintentionally-doped portion near to the well layer.
    Type: Application
    Filed: December 29, 2006
    Publication date: July 5, 2007
    Applicant: EPISTAR CORPORATION
    Inventors: Shih-Nan Yen, Jung-Tu Chiu, Yu-Jiun Shen, Ching-Fu Tsai