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Light emitting device having light extraction structure

  • US 8,003,993 B2
  • Filed: 12/14/2009
  • Issued: 08/23/2011
  • Est. Priority Date: 05/08/2006
  • Status: Active Grant
First Claim
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1. A light emitting device comprising:

  • a conductive support structure;

    a first electrode over the conductive support structure;

    a semiconductor layer over the first electrode;

    a light extracting structure arranged over the semiconductor layer; and

    a second electrode over the semiconductor layer,wherein the light extracting structure has a plurality of holes or grooves,wherein a transparent material that is different from a material of the light extracting structure is located in the holes or grooves,and wherein the refractive index of the light extracting structure is greater or less than the refractive index of the transparent material.

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