Semiconductor light emitting device
First Claim
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1. A semiconductor light emitting device comprising:
- a light emitting structure including a first conductive semiconductor layer, an active layer under the first conductive semiconductor layer, and a second conductive semiconductor layer under the active layer;
a reflective structure comprising a first layer having a first refractive index and a second layer having a second refractive index different from the first refractive index under the light emitting structure;
a first electrode layer formed on the first conductive semiconductor layer;
a metal layer under the reflective structure; and
a conductive support member having a metal material under the metal layer,wherein the metal layer includes a plurality of protrusions and the plurality of protrusions are protruded in a direction toward a lower surface of the second conductive semiconductor layer,wherein the metal layer makes electric contact with the reflective structure and the light emitting structure,wherein the first conductive semiconductor layer includes an upper surface,wherein the upper surface of the first conductive semiconductor layer includes a first region formed in a roughness and a second region formed in a flat surface under the first electrode layer,wherein the first conductive semiconductor layer includes an AlGaN based semiconductor layer and the second conductive semiconductor layer includes an AlGaN based semiconductor layer,wherein an outer sidewall of the conductive support member extends outward beyond an outer sidewall of the light emitting structure, andwherein the lower surface of the second conductive semiconductor layer is contacted with the plurality of protrusions and the reflective structure.
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Abstract
Disclosed are a semiconductor light emitting device. The semiconductor light emitting device comprises a light emitting structure comprising a III-V group compound semiconductor, a reflective layer comprising mediums, which are different from each other and alternately stacked under the light emitting structure, and a second electrode layer under the reflective layer.
35 Citations
20 Claims
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1. A semiconductor light emitting device comprising:
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a light emitting structure including a first conductive semiconductor layer, an active layer under the first conductive semiconductor layer, and a second conductive semiconductor layer under the active layer; a reflective structure comprising a first layer having a first refractive index and a second layer having a second refractive index different from the first refractive index under the light emitting structure; a first electrode layer formed on the first conductive semiconductor layer; a metal layer under the reflective structure; and a conductive support member having a metal material under the metal layer, wherein the metal layer includes a plurality of protrusions and the plurality of protrusions are protruded in a direction toward a lower surface of the second conductive semiconductor layer, wherein the metal layer makes electric contact with the reflective structure and the light emitting structure, wherein the first conductive semiconductor layer includes an upper surface, wherein the upper surface of the first conductive semiconductor layer includes a first region formed in a roughness and a second region formed in a flat surface under the first electrode layer, wherein the first conductive semiconductor layer includes an AlGaN based semiconductor layer and the second conductive semiconductor layer includes an AlGaN based semiconductor layer, wherein an outer sidewall of the conductive support member extends outward beyond an outer sidewall of the light emitting structure, and wherein the lower surface of the second conductive semiconductor layer is contacted with the plurality of protrusions and the reflective structure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A semiconductor light emitting device comprising:
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a light emitting structure including a first conductive semiconductor layer, a second conductive semiconductor layer under the first conductive semiconductor layer, and an active layer between the first conductive semiconductor layer and the second conductive semiconductor layer; an electrode on an upper surface of the first conductive semiconductor layer; a conductive support member under a lower surface of the second conductive semiconductor layer; a metal layer between the lower surface of the second conductive semiconductor layer and the conductive support member; and a reflective structure between the metal layer and the lower surface of the second conductive semiconductor layer, wherein the first conductive semiconductor layer includes an AlGaN-based layer and the second conductive semiconductor layer includes an AlGaN-based layer, wherein the reflective structure includes a first layer and a second layer under the first layer, wherein the first layer includes a different material from the second layer, wherein the metal layer includes a bottom part located at lower position than that of a bottom surface of the reflective structure and a plurality of upper parts protruded in a direction toward the lower surface of the second conductive semiconductor layer, wherein the bottom part of the metal layer is disposed between the reflective structure and the conductive support member, wherein the plurality of upper parts of the metal layer is physically contacted with the lower surface of the second conductive semiconductor layer, wherein a top surface of the reflective structure is physically contacted with the lower surface of the second conductive semiconductor layer, and wherein a top surface of the first conductive semiconductor layer includes a roughness region corresponded to a first region of the reflective structure and an even region. - View Dependent Claims (14, 15, 16)
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17. A semiconductor light emitting device comprising:
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a light emitting structure including a first conductive semiconductor layer, a second conductive semiconductor layer under the first conductive semiconductor layer, and an active layer between the first conductive semiconductor layer and the second conductive semiconductor layer; an electrode on a top surface of the first conductive semiconductor layer; a conductive support member under a lower surface of the second conductive semiconductor layer; a metal layer between the lower surface of the second conductive semiconductor layer and the conductive support member; and a reflective structure between the metal layer and the lower surface of the second conductive semiconductor layer, wherein the first conductive semiconductor layer includes an AlGaN-based layer and the second conductive semiconductor layer includes an AlGaN-based layer, wherein the reflective structure includes a first layer and a second layer under the first layer, wherein the first layer includes a different material from the second layer, wherein the metal layer includes a bottom part located at lower position than that of a bottom surface of the reflective structure and a plurality of protrusions spaced apart from each other, wherein the bottom part of the metal layer is disposed between the reflective structure and the conductive support member, wherein a top surface of each of the plurality of protrusion are physically contacted with the lower surface of the second conductive semiconductor layer, wherein a top surface of the reflective structure is physically contacted with the lower surface of the second conductive semiconductor layer, and wherein an outer region of a top part of the conductive support member is disposed around the bottom part of the metal layer. - View Dependent Claims (18, 19, 20)
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Specification