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Light emitting device

  • US 9,166,105 B2
  • Filed: 12/28/2012
  • Issued: 10/20/2015
  • Est. Priority Date: 04/19/2011
  • Status: Active Grant
First Claim
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1. A light-emitting device comprising:

  • 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.

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