Patents by Inventor Tzu-Hao Chao

Tzu-Hao Chao 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).

  • Phosphor coating process for light emitting diode
    Publication number: 20080254393
    Abstract: A phosphor coating process for a light-emitting device is described. A light-emitting diode chip is bonded on a substrate. A light-sensitive layer is formed over the light-emitting diode and the substrate. The light-sensitive layer is patterned by a photolithography process to expose an area of the light-emitting diode chip, on which desires a phosphor coating. A phosphor-adhesive material is filled on the area of the light-emitting diode chip.
    Type: Application
    Filed: August 17, 2007
    Publication date: October 16, 2008
    Inventors: Tzu-Hao Chao, Yi-Tsuo Wu