Patents by Inventor Nien-Tze Yeh

Nien-Tze Yeh 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).

  • Patent number: 7901963
    Abstract: The present invention discloses a surface roughening method for an LED substrate, which uses a grinding technology and an abrasive paper of from No. 300 to No. 6000 to grind the surface of a substrate to form a plurality of irregular concave zones and convex zones on the surface of the substrate. Next, a semiconductor light emitting structure is formed on the surface of the substrate. The concave zones and convex zones can scatter and diffract the light inside LED, reduce the horizontally-propagating light between the substrate and the semiconductor layer, decrease the probability of total reflection and promote LED light extraction efficiency.
    Type: Grant
    Filed: January 22, 2008
    Date of Patent: March 8, 2011
    Assignee: Tekcore Co., Ltd.
    Inventors: Nien-Tze Yeh, Chia-Ming Lee
  • Publication number: 20090186435
    Abstract: The present invention discloses a surface roughening method for an LED substrate, which uses a grinding technology and an abrasive paper of from No. 300 to No. 6000 to grind the surface of a substrate to form a plurality of irregular concave zones and convex zones on the surface of the substrate. Next, a semiconductor light emitting structure is formed on the surface of the substrate. The concave zones and convex zones can scatter and diffract the light inside LED, reduce the horizontally-propagating light between the substrate and the semiconductor layer, decrease the probability of total reflection and promote LED light extraction efficiency.
    Type: Application
    Filed: January 22, 2008
    Publication date: July 23, 2009
    Inventors: Nien-Tze Yeh, Chia-Ming Lee
  • Patent number: D619976
    Type: Grant
    Filed: October 12, 2009
    Date of Patent: July 20, 2010
    Assignee: Tekcore Co., Ltd.
    Inventors: Yu-Chuan Liu, Kuan-Ting Chen, Nien-Tze Yeh