Light-emitting device and manufacturing method thereof
First Claim
1. A light-emitting device, comprising:
- a substrate having a top surface, wherein the top surface comprises a first portion and a second portion;
a first semiconductor stack comprising a first upper surface and a first side wall, wherein the first semiconductor stack is on the first portion;
a second semiconductor stack comprising a second upper surface and a second side wall, wherein the second semiconductor stack is on the first upper surface, and wherein the second side wall is devoid of connecting the first side wall;
a plurality of first concavo-convex structures on the first portion; and
a plurality of second concavo-convex structures on the second portion and not covered by the first semiconductor stack;
wherein the first side wall and the second portion of the top surface form an acute angle α
between thereof; and
wherein the second concavo-convex structures have smaller size than that of the first concavo-convex structures.
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Abstract
A light-emitting device includes a substrate having a top surface, wherein the top surface includes a first portion and a second portion; a first semiconductor stack including a first upper surface and a first side wall, wherein the first semiconductor stack is on the first portion; a second semiconductor stack including a second upper surface and a second side wall, wherein the second semiconductor stack is on the first upper surface, and wherein the second side wall is devoid of connecting the first side wall; a plurality of first concavo-convex structures on the first portion; and a plurality of second concavo-convex structures on the second portion; wherein the first side wall and the second portion of the top surface form an acute angle α between thereof; and wherein the second concavo-convex structures have smaller size than that of the first concavo-convex structures.
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Citations
20 Claims
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1. A light-emitting device, comprising:
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a substrate having a top surface, wherein the top surface comprises a first portion and a second portion; a first semiconductor stack comprising a first upper surface and a first side wall, wherein the first semiconductor stack is on the first portion; a second semiconductor stack comprising a second upper surface and a second side wall, wherein the second semiconductor stack is on the first upper surface, and wherein the second side wall is devoid of connecting the first side wall; a plurality of first concavo-convex structures on the first portion; and a plurality of second concavo-convex structures on the second portion and not covered by the first semiconductor stack; wherein the first side wall and the second portion of the top surface form an acute angle α
between thereof; andwherein the second concavo-convex structures have smaller size than that of the first concavo-convex structures. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification