Light emitting device having a patterned substrate and the method thereof
First Claim
1. A light-emitting device, comprisinga patterned substrate having an uneven surface composed of a plurality of depressions and/or extrusions;
- a light-emitting stack overlaying the patterned substrate, comprising a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer,wherein at least one of the plurality of depressions and/or extrusions comprises a top portion, a bottom portion, and a sidewall portion, and at least part of the sidewall portion comprises a curve, andwherein said top portion is substantially parallel to said bottom portion and includes a rough surface.
1 Assignment
0 Petitions
Accused Products
Abstract
This disclosure provides a light-emitting device including a patterned substrate and the manufacturing method thereof. The patterned substrate has a plurality of depressions and/or extrusions for scattering light emitted from a light-emitting layer. Each of the plurality of depressions and/or extrusions comprises a top portion, a bottom portion, and a sidewall portion enclosing the top portion and the bottom portion, and at least part of the sidewall portion comprises a curve. In a preferred embodiment, the light-emitting device further comprises a rough surface formed on at least one of the top portion, the bottom portion, and the sidewall portion.
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Citations
18 Claims
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1. A light-emitting device, comprising
a patterned substrate having an uneven surface composed of a plurality of depressions and/or extrusions; -
a light-emitting stack overlaying the patterned substrate, comprising a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer, wherein at least one of the plurality of depressions and/or extrusions comprises a top portion, a bottom portion, and a sidewall portion, and at least part of the sidewall portion comprises a curve, and wherein said top portion is substantially parallel to said bottom portion and includes a rough surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A light-emitting device, comprising
a patterned substrate having an uneven surface composed of a plurality of depressions and/or extrusions; -
a light-emitting stack overlaying the patterned substrate, comprising a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer, wherein at least one of the plurality of depressions and/or extrusions comprises a top portion, a bottom portion, and wherein said top portion is substantially parallel to said bottom portion and includes a rough surface. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
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Specification