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Light emitting device having a plurality of light emitting cells and method of fabricating the same

  • US 7,772,601 B2
  • Filed: 07/05/2005
  • Issued: 08/10/2010
  • Est. Priority Date: 02/04/2005
  • Status: Active Grant
First Claim
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1. A light emitting device having a plurality of light emitting cells, comprising:

  • a thermally conductive substrate having a thermal conductivity higher than that of a sapphire substrate;

    a plurality of light emitting cells serially connected to one another on the thermally conductive substrate; and

    a semi-insulating buffer layer interposed between the thermally conductive substrate and the light emitting cells,wherein the thermally conductive substrate comprises AlN or SiC,wherein the semi-insulating buffer layer is formed of semi-insulating GaN doped with an acceptor,wherein the acceptor is iron (Fe).

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