Light-emitting device having a patterned substrate and the method thereof
First Claim
1. A light-emitting device, comprising:
- a textured substrate comprising a plurality of textured structures, wherein the plurality of textured structures and the textured substrate are both composed of sapphire; and
a light-emitting stack overlaying the textured substrate, comprising a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer,wherein each of the plurality of textured structures comprises a top portion having a first top-view shape, a bottom portion parallel to the top portion and having a second top-view shape different from the first top-view shape, and three symmetric planes connecting the top portion and the bottom portion,wherein the first top-view shape comprises a first periphery and the second top-view shape comprises a second periphery, the first periphery is enclosed by the second periphery, and various distances are between the first periphery and the second periphery.
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Accused Products
Abstract
A light-emitting device comprises a textured substrate comprising a plurality of textured structures, wherein the textured structures and the textured substrate are both composed of sapphire; and a light-emitting stack overlaying the textured substrate, comprising a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer, wherein each of the plurality of textured structures comprises a top portion having a first top-view shape, and a bottom portion parallel to the top portion and having a second top-view shape, wherein the first top-view shape comprises a circle or an ellipse, the first top-view shape comprises a first periphery and the second top-view shape comprises a second periphery, the first periphery is enclosed by the second periphery, and various distances are between each of the first periphery and the second periphery.
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Citations
17 Claims
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1. A light-emitting device, comprising:
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a textured substrate comprising a plurality of textured structures, wherein the plurality of textured structures and the textured substrate are both composed of sapphire; and a light-emitting stack overlaying the textured substrate, comprising a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer, wherein each of the plurality of textured structures comprises a top portion having a first top-view shape, a bottom portion parallel to the top portion and having a second top-view shape different from the first top-view shape, and three symmetric planes connecting the top portion and the bottom portion, wherein the first top-view shape comprises a first periphery and the second top-view shape comprises a second periphery, the first periphery is enclosed by the second periphery, and various distances are between the first periphery and the second periphery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A light-emitting device, comprising:
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a textured substrate comprising a boundary and a plurality of textured structures within the boundary, wherein the plurality of textured structures and the textured substrate are both composed of sapphire; and a light-emitting stack overlaying the textured substrate, comprising a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer, wherein one of the plurality of textured structures is constituted by a bottom portion and three symmetric planes formed inside a periphery of the bottom portion, the at least three symmetric planes are inclined to intersect at one point and without forming a flat portion. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification