Patents by Inventor Yl-Wen Ku

Yl-Wen Ku 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).

  • Publication number: 20130049051
    Abstract: Disclosed is a light-emitting device comprising: a semiconductor stack layer; a reflective layer on the semiconductor stack layer; a first buffer layer comprising a compound comprising a metallic element and a non-metallic element on the reflective layer; a first electrode; and an electrical insulating layer disposed between the first buffer layer and the first electrode.
    Type: Application
    Filed: August 28, 2012
    Publication date: February 28, 2013
    Applicant: Epistar Corporation
    Inventors: Jia-Kuen Wang, Chien-Fu Shen, Chao-Hsing Chen, Yu-Chen Yang, Hui-Chun Yeh, Yl-Wen Ku, Hung-Che Chen, Chih-Nan Lin