Light emitting devices having light coupling layers
First Claim
Patent Images
1. A light emitting device, comprising:
- a substrate;
a p-type Group III-V semiconductor layer adjacent to the substrate;
an active layer adjacent to the p-type Group III-V semiconductor layer;
an n-type Group III-V semiconductor layer adjacent to the active layer;
a light coupling structure adjacent to the n-type Group III-V semiconductor layer, the light coupling structure having one or more Group III-V semiconductor materials, the light coupling structure having a corrugated surface comprising u-type gallium nitride; and
an electrode in electrical communication with the n-type semiconductor layer, the electrode formed on a top surface of the corrugated surface of the light coupling structure and contacting the u-type gallium nitride of the corrugated surface.
7 Assignments
0 Petitions
Accused Products
Abstract
A light emitting device comprises a first layer of an n-type semiconductor material, a second layer of a p-type semiconductor material, and an active layer between the first layer and the second layer. A light coupling layer is disposed adjacent to one of the first layer and the second layer. In some cases, the light coupling layer is formed by roughening a buffer layer of the light emitting device. The light emitting device includes an electrode in electrical communication with one of the first layer and the second layer through a portion of the light coupling layer.
125 Citations
30 Claims
-
1. A light emitting device, comprising:
-
a substrate; a p-type Group III-V semiconductor layer adjacent to the substrate; an active layer adjacent to the p-type Group III-V semiconductor layer; an n-type Group III-V semiconductor layer adjacent to the active layer; a light coupling structure adjacent to the n-type Group III-V semiconductor layer, the light coupling structure having one or more Group III-V semiconductor materials, the light coupling structure having a corrugated surface comprising u-type gallium nitride; and an electrode in electrical communication with the n-type semiconductor layer, the electrode formed on a top surface of the corrugated surface of the light coupling structure and contacting the u-type gallium nitride of the corrugated surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
-
-
21. A light emitting device, comprising:
-
a first layer of a first conductivity type semiconductor material and a second layer of a second conductivity type semiconductor material; an active layer between the first layer and the second layer; a light coupling layer adjacent to the second layer, the light coupling layer comprising a third layer of u-type gallium nitride and having a corrugated surface including the third layer of u-type gallium nitride, wherein a portion of the light coupling layer is formed from the second layer; and an electrode in electrical communication with the second layer, the electrode formed on a top surface of the corrugated surface of the light coupling layer and contacting the third layer of u-type gallium nitride. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30)
-
Specification