Vertical nitride based semiconductor light emitting device having improved light extraction efficiency
First Claim
1. A vertical nitride semiconductor light emitting device comprising:
- a conductive substrate having light transmissibility;
a first conductivity-type nitride semiconductor layer formed on the conductive substrate;
an active layer formed on the first conductivity-type nitride semiconductor layer; and
a second conductivity-type nitride semiconductor layer formed on the active layer, a conductive light scattering layer formed on an underside of the conductive substrate, the conductive light scattering layer made of a conductive material having a light transmissibility of 70% or more and having a rough pattern formed on an outer surface to scatter light.
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Abstract
The invention provides a nitride semiconductor light emitting device. In the invention, a first conductivity-type nitride semiconductor layer is formed on a conductive substrate having light transmissibility. An active layer is formed on the first conductivity-type nitride semiconductor layer. Also, a second conductivity-type nitride semiconductor layer is formed on the active layer. Further, a conductive light scattering layer made of a conductive material is formed on an underside of the substrate. The conductive light scattering layer has light transmissibility of 70% or more and has a rough pattern formed on an outer surface to scatter light.
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Citations
10 Claims
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1. A vertical nitride semiconductor light emitting device comprising:
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a conductive substrate having light transmissibility;
a first conductivity-type nitride semiconductor layer formed on the conductive substrate;
an active layer formed on the first conductivity-type nitride semiconductor layer; and
a second conductivity-type nitride semiconductor layer formed on the active layer, a conductive light scattering layer formed on an underside of the conductive substrate, the conductive light scattering layer made of a conductive material having a light transmissibility of 70% or more and having a rough pattern formed on an outer surface to scatter light. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification