Patents by Inventor Younghak Chang

Younghak Chang 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: 20120286286
    Abstract: Disclosed are a non-polar nitride-based light emitting device and a method for fabricating the same. The non-polar nitride-based light emitting device includes a substrate, a first-type semiconductor layer on the substrate, an active layer on the active layer, a second-type semiconductor layer on the active layer, a light extraction layer on the second-type semiconductor layer and including at least one layer including indium having a plurality of unit structures having an inverted pyramidal intaglio shape, a first electrode electrically connected to the first-type semiconductor layer, and a second electrode electrically connected to the second-type semiconductor layer.
    Type: Application
    Filed: May 11, 2012
    Publication date: November 15, 2012
    Inventors: Sukkoo JUNG, Younghak Chang, Hyunggu Kim, Kyuhyun Bang