Light-emitting devices having coplanar electrical contacts adjacent to a substrate surface opposite an active region and methods of forming the same
First Claim
1. A light-emitting device, comprising:
- first and second opposing surfaces of a layer;
an active region comprising a first active layer having a first conductivity type on the first surface and a second active layer having a second conductivity type on the first active layer;
a first electrical contact adjacent to the second surface;
a partially transparent current spreading layer on the second active layer;
a contact plug that is substantially non-adjacent an edge of the active region and extending through the active region to contact the current spreading layer so as to couple the first electrical contact to the second active layer; and
a second electrical contact that is coupled to the second surface without extending through the second surface,wherein the current spreading layer forms an ohmic contact with the second active layer, andwherein the ohmic contact comprises a reflective ohmic contact.
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Accused Products
Abstract
A light-emitting device includes a substrate having first and second opposing surfaces. An active region is on the first surface and first and second electrical contacts are adjacent to the second surface and are conductively coupled to the active region. In other embodiments, a light-emitting device includes a substrate having first and second opposing surfaces. An active region is on the first surface and includes a first active layer having a first conductivity type on the first surface and a second active layer having a second conductivity type on the first active layer. A first electrical contact is adjacent to the second surface. A contact plug extends through the substrate and the active region and couples the first electrical contact to the second active layer. A second electrical contact is coupled to the substrate at the second surface.
35 Citations
37 Claims
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1. A light-emitting device, comprising:
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first and second opposing surfaces of a layer; an active region comprising a first active layer having a first conductivity type on the first surface and a second active layer having a second conductivity type on the first active layer; a first electrical contact adjacent to the second surface; a partially transparent current spreading layer on the second active layer; a contact plug that is substantially non-adjacent an edge of the active region and extending through the active region to contact the current spreading layer so as to couple the first electrical contact to the second active layer; and a second electrical contact that is coupled to the second surface without extending through the second surface, wherein the current spreading layer forms an ohmic contact with the second active layer, and wherein the ohmic contact comprises a reflective ohmic contact. - 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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first and second opposing surfaces of a layer; an active region on the first surface, the active region including a first active layer having a first conductivity type on the first surface and a second active layer having a second conductivity type on the first active layer; a partially transparent current spreading layer on the second active layer of the active region, the current spreading layer including a reflective ohmic contact that is substantially non-adjacent an edge of the active region; and first and second electrical contacts adjacent to the second surface that are conductively coupled to the active region, at least one of the first and second electrical contacts being disposed on the second surface without extending through the substrate. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A method of forming a light-emitting device, comprising:
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forming an active region on a first surface of first and second opposing surfaces of a layer; forming a partially transparent current spreading layer on the active region, the current spreading layer including a reflective ohmic contact with the active region, wherein the reflective ohmic contact is substantially non-adjacent an edge of the active region; forming first and second electrical contacts adjacent to the second surface that are conductively coupled to the active region such that at least one of the first and second electrical contacts is disposed on the second surface without extending through the active region. - View Dependent Claims (28, 29, 30, 31)
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32. A light-emitting device, comprising:
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a flat planar surface defining a planar surface area and comprising first and second contact surfaces; an active region on the flat planar surface, the active region including a first active layer having a first conductivity type and a second active layer on the first active layer having a second conductivity type; a current spreading layer on the second active layer of the active region; a contact plug that is substantially non-adjacent an edge of the active region and that extends through the active region to contact the current spreading layer, the contact plug comprising the first contact surface; a first electrical contact that is within the planar surface area, the first electrical contact on the first contact surface and adjacent the second contact surface, the first electrical contact conductively coupled to the second active layer through the current spreading layer via the contact plug; and a second electrical contact that is within the planar surface area, the second electrical contact on the second contact surface and conductively coupled to the first active layer. - View Dependent Claims (33, 34, 35, 36, 37)
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Specification