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SYSTEM AND METHOD FOR EMITTER LAYER SHAPING

  • US 20100270560A1
  • Filed: 06/07/2010
  • Published: 10/28/2010
  • Est. Priority Date: 02/08/2008
  • Status: Active Grant
First Claim
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1. An LED, comprising:

  • a base substrate; and

    an emitter layer on a surface of the substrate, wherein the emitter layer has a shaped portion, wherein the shaped portion comprises an exit area, an emitter area, a height between the emitter area and the exit face and sidewalls, wherein each of the sidewalls is positioned and shaped to cause at least a majority of rays having a straight transmission path from the emitter area to that sidewall to reflect to the exit face with an angle of incidence at the exit face at less than or equal to a critical angle at the exit face and wherein the size of the exit and wherein shapes of the sidewalls and the size of the exit face are selected so that at least 60% of the light generated in the emitter layer exits the exit face into the substrate in a selected half angle.

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