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Blue light-emitting diode with degenerate junction structure

  • US 5,338,944 A
  • Filed: 09/22/1993
  • Issued: 08/16/1994
  • Est. Priority Date: 09/22/1993
  • Status: Expired due to Term
First Claim
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1. A light emitting diode that emits light in the blue region of the visible spectrum with increased brightness and efficiency, said light emitting diode comprising:

  • an n-type silicon carbide substrate;

    an n-type silicon carbide top layer;

    a light emitting p-n junction structure between said n-type substrate and said n-type top layer, said p-n junction being formed of respective portions of n-type silicon carbide and p-type silicon carbide; and

    means between said n-type top layer and said n-type substrate for coupling said n-type top layer to said light-emitting p-n junction structure while preventing n-p-n behavior between said n-type top layer, said p-type portion in said junction structure, and said n-type substrate.

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