Light-emitting device having a patterned surface
DCFirst Claim
1. A light-emitting device comprising:
- a substrate having a top surface and a plurality of patterned units protruding from the top surface of the substrate; and
a light-emitting stack formed on the substrate and having an active layer with a first surface substantially parallel to the top surface of the substrate,wherein each of the plurality of patterned units comprises a circular shape in a top view of the light-emitting device,wherein each of the plurality of patterned units comprises a cross-section comprising a width and a depth smaller than the width.
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Abstract
A light-emitting device comprises a substrate having a top surface and a plurality of patterned units protruding from the top surface; and a light-emitting stack formed on the substrate and having an active layer with a first surface substantially parallel to the top surface, wherein one of the plurality of patterned units comprises a plurality of connecting sides constituting a first polygon shape in a top view of the light-emitting device, wherein the one of the plurality of patterned units comprises a vertex and a plurality of inclined surfaces respectively extending from the plurality of connecting sides, the plurality of inclined surfaces commonly joining at the vertex in a cross-sectional view of the light-emitting device, the vertex being between the top surface of the substrate and the first surface of the active layer, and the plurality of inclined surfaces comprises a second polygon shape in the cross-sectional view of the light-emitting device.
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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 and a plurality of patterned units protruding from the top surface of the substrate; and a light-emitting stack formed on the substrate and having an active layer with a first surface substantially parallel to the top surface of the substrate, wherein each of the plurality of patterned units comprises a circular shape in a top view of the light-emitting device, wherein each of the plurality of patterned units comprises a cross-section comprising a width and a depth smaller than the width. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A light-emitting device comprising:
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a substrate having a top surface and a plurality of patterned units on the top surface, the plurality of patterned units comprising a same material as that of the substrate; and a light-emitting stack formed on the substrate and having an active layer with a first surface substantially parallel to the top surface of the substrate, wherein one of the plurality of patterned units comprises a plurality of connecting sides constituting a first polygon shape in a top view of the light-emitting device, wherein the one of the plurality of patterned units comprises a vertex and a plurality of inclined surfaces respectively extending from the plurality of connecting sides, the plurality of inclined surfaces commonly joining at the vertex in a cross-sectional view of the light-emitting device, the vertex being between the top surface of the substrate and the first surface of the active layer, and the plurality of inclined surfaces comprises a second polygon shape in the cross-sectional view of the light-emitting device, and wherein the plurality of inclined surfaces is substantially not parallel to the first surface of the active layer. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification