Patents by Inventor Chung-Hsiang Tu

Chung-Hsiang Tu 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).

  • Light emitting device
    Patent number: 9166105
    Abstract: A light-emitting device includes: a substrate; a first semiconductor layer disposed on the substrate and having a first surface; a rough structure formed in the first semiconductor layer, the rough structure comprising porous structures formed therein and a portion of the porous structures having openings exposed on the first surface of the first semiconductor layer; and an active layer formed on the first semiconductor layer.
    Type: Grant
    Filed: December 28, 2012
    Date of Patent: October 20, 2015
    Assignee: EPISTAR CORPORATION
    Inventors: De-Shan Kuo, Ting-Chia Ko, Chung-Hsiang Tu