Light emitting device and light emitting device package
First Claim
1. A light emitting device, comprising:
- a substrate having a front surface on which a plurality of protruding portions are formed;
a first semiconductor layer of a first conductivity type formed to cover the plurality of protruding portions;
a light emitting layer formed over the first semiconductor layer;
a first electrode formed over the first semiconductor layer, and not contacting the light emitting layer;
a second semiconductor layer of a second conductivity type formed over the light emitting layer; and
a second electrode formed over the second semiconductor layer,wherein the plurality of protruding portions are made of a same material,wherein a portion of the front surface of the substrate, which is located between the plurality of protruding portions, is flatter than surfaces of the plurality of protruding portions, andwherein side surfaces of each of the plurality of protruding portions are concave in a cross-sectional view.
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Accused Products
Abstract
A light emitting device includes a light emitting layer, a substrate that is transparent to an emission wavelength of the light emitting layer and positioned to receive an emission wavelength from the light emitting layer, a convex pattern including a collection of a plurality of convex portions discretely arranged on a front surface of the substrate with a first pitch, an n type nitride semiconductor layer located on the front surface of the substrate to cover the convex pattern and a p type nitride semiconductor layer located on the light emitting layer. The light emitting layer is located on the n type semiconductor layer. Each of the convex portions includes a sub convex pattern comprising a plurality of fine convex portions discretely formed at the top of the convex portion with a second pitch smaller than the first pitch, and a base supporting the sub convex pattern.
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Citations
17 Claims
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1. A light emitting device, comprising:
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a substrate having a front surface on which a plurality of protruding portions are formed; a first semiconductor layer of a first conductivity type formed to cover the plurality of protruding portions; a light emitting layer formed over the first semiconductor layer; a first electrode formed over the first semiconductor layer, and not contacting the light emitting layer; a second semiconductor layer of a second conductivity type formed over the light emitting layer; and a second electrode formed over the second semiconductor layer, wherein the plurality of protruding portions are made of a same material, wherein a portion of the front surface of the substrate, which is located between the plurality of protruding portions, is flatter than surfaces of the plurality of protruding portions, and wherein side surfaces of each of the plurality of protruding portions are concave in a cross-sectional view. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification