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III nitride semiconductor light emitting device and method for manufacturing the same

  • US 9,263,642 B2
  • Filed: 09/30/2011
  • Issued: 02/16/2016
  • Est. Priority Date: 09/30/2010
  • Status: Active Grant
First Claim
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1. A III nitride semiconductor light emitting device comprising:

  • a III nitride semiconductor laminate including a light emitting layer, and a first conductivity-type semiconductor layer and a second conductivity-type semiconductor layer having a conductivity type different from the first conductivity type, the light emitting layer being sandwiched between the first conductivity type semiconductor layer and the second conductivity type semiconductor layer; and

    a first electrode and a second electrode formed on the first conductivity-type semiconductor layer side and the second conductivity-type semiconductor layer side of the III nitride semiconductor laminate, respectively, whereina composite layer having a reflective electrode portion and a contact portion made of AlxGa1-xN (0≦

    x≦

    0.05) is provided on a second surface of the III nitride semiconductor laminate, the second surface being opposite to a first surface on the light extraction side,the contact portion is thicker than the reflective electrode portion,the second electrode is located at the second surface side, and directly contacts the reflective electrode portion and the contact portion, andthe reflective electrode portion and the contact portion are located directly on the second surface.

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