Semiconductor light emitting device
First Claim
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1. A semiconductor light emitting device comprising:
- a substrate that has a main surface that comprises a plurality of protrusions in a two-dimensionally repeated pattern;
a plurality of semiconductor layers disposed on the main surface of the substrate and comprising a GaN based semiconductor; and
an ohmic electrode disposed on a top layer of the semiconductor layers and comprising a plurality of openings,wherein each of the protrusions has a side surface that is inclined to a stacking plane of the semiconductor layers and configured to scatter or diffract light generated in the semiconductor layers, andwherein at least one side surface of the protrusions is located in each of the openings in plan view of the semiconductor light emitting device.
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Abstract
A semiconductor light emitting device including a substrate, an electrode and a light emitting region is provided. The substrate may have protruding portions formed in a repeating pattern on substantially an entire surface of the substrate while the rest of the surface may be substantially flat. The cross sections of the protruding portions taken along planes orthogonal to the surface of the substrate may be semi-circular in shape. The cross sections of the protruding portions may in alternative be convex in shape. A buffer layer and a GaN layer may be formed on the substrate.
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Citations
19 Claims
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1. A semiconductor light emitting device comprising:
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a substrate that has a main surface that comprises a plurality of protrusions in a two-dimensionally repeated pattern; a plurality of semiconductor layers disposed on the main surface of the substrate and comprising a GaN based semiconductor; and an ohmic electrode disposed on a top layer of the semiconductor layers and comprising a plurality of openings, wherein each of the protrusions has a side surface that is inclined to a stacking plane of the semiconductor layers and configured to scatter or diffract light generated in the semiconductor layers, and wherein at least one side surface of the protrusions is located in each of the openings in plan view of the semiconductor light emitting device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification