SEMICONDUCTOR LIGHT EMITTING DEVICE
First Claim
1. A semiconductor light emitting device, comprising:
- a substrate having a first surface and a second surface, the second surface being opposite to the first surface;
a light emitting structure disposed on the first surface of the substrate and comprising a first conductivity-type semiconductor layer, an active layer and a second conductivity-type semiconductor layer; and
a reflector disposed on the second surface of the substrate and comprising a low refractive index layer and a Bragg layer,wherein the Bragg layer comprises a plurality of alternately stacked layers having different refractive indices, andwherein a refractive index of the low refractive index layer is lower than a refractive index of the Bragg layer.
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Accused Products
Abstract
A semiconductor light emitting device may include a substrate having a first surface and a second surface, the second surface being opposite to the first surface; a light emitting structure disposed on the first surface of the substrate and including a first conductivity-type semiconductor layer, an active layer and a second conductivity-type semiconductor layer; and a reflector disposed on the second surface of the substrate and including a low refractive index layer and a Bragg layer, wherein the Bragg layer includes a plurality of alternately stacked layers having different refractive indices, and wherein a refractive index of the low refractive index layer is lower than a refractive index of the Bragg layer.
12 Citations
20 Claims
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1. A semiconductor light emitting device, comprising:
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a substrate having a first surface and a second surface, the second surface being opposite to the first surface; a light emitting structure disposed on the first surface of the substrate and comprising a first conductivity-type semiconductor layer, an active layer and a second conductivity-type semiconductor layer; and a reflector disposed on the second surface of the substrate and comprising a low refractive index layer and a Bragg layer, wherein the Bragg layer comprises a plurality of alternately stacked layers having different refractive indices, and wherein a refractive index of the low refractive index layer is lower than a refractive index of the Bragg layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A semiconductor light emitting device, comprising:
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a light emitting structure comprising a first conductivity-type semiconductor layer, an active layer and a second conductivity-type semiconductor layer; a Bragg layer disposed on a surface of the light emitting structure and comprising a plurality of alternately stacked layers having different refractive indices; and a low refractive index layer disposed on at least one surface of the Bragg layer and having a refractive index lower than a refractive index of the Bragg layer. - View Dependent Claims (15)
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16. A semiconductor light emitting diode (LED) chip comprising a first surface, on which a first electrode and a second electrode are disposed, and a second surface being opposite to the first surface, the semiconductor LED chip further comprising:
a reflector disposed on the second surface of the semiconductor LED chip, wherein the reflector comprises a low refractive index layer and a Bragg layer, a refractive index of the low refractive index layer being lower than a refractive index of the Bragg layer. - View Dependent Claims (17, 18, 19, 20)
Specification