Optoelectronic device
View Patent ↗An optoelectronic device such as a light-emitting diode chip is disclosed. It includes a substrate, a multi-layer epitaxial structure, a first metal electrode layer, a second metal electrode layer, a first bonding pad and a second bonding pad. The multi-layer epitaxial structure on the transparent substrate comprises a semiconductor layer of a first conductive type, an active layer, and a semiconductor layer of a second conductive type. The first bonding pad and the second bonding pad are on the same level. Furthermore, the first metal electrode layer can be patterned so the current is spread to the light-emitting diode chip uniformly.
1. The optoelectronic device, comprising:
a multi-layer epitaxy layer, comprising a first conductive type semiconductor layer, an active layer, and a second conductive type semiconductor layer, wherein the first conductive layer comprises a first side and a second side;
a first metal electrode layer with a first pattern located on the first side of the first conductive type semiconductor layer, wherein the first metal electrode layer comprises a plane;
a first bonding pad located on a second side of the first conductive type semiconductor layer; and
a channel passing through the first conductive type semiconductor layer to electrically connect the first bonding pad and the first conductive type semiconductor layer, wherein the channel is connected to the first pattern,
wherein the first pattern comprises a channel connecting portion which is electrically connected to the channel and a finger-shaped electrode which is connected to the channel connecting portion.
2. The optoelectronic device according to claim 1 , wherein the plane comprises a center, four corners, and four edges.
3. The optoelectronic device according to claim 2 , wherein the first pattern comprises one or plural ring(s) which are connected to the channel-connecting portion.
4. The optoelectronic device according to claim 2 , wherein the first pattern comprises a spiral shape which is connected to the channel-connecting portion.
5. The optoelectronic device according to claim 2 , wherein the finger-shaped electrode extends toward one of the corners.
6. The optoelectronic device according to claim 2 , wherein the finger-shaped electrode extends along one of the edges parallelly or vertically.
7. The optoelectronic device according to claim 2 , wherein the first pattern is a mesh-shaped pattern.
8. The optoeletronic device according to claim 1 wherein the plane comprises a center, four corners, and four edges, wherein the channel-connecting portion is located on one of the four corners.
9. The optoelectronic device according to claim 8 , wherein the finger-shaped electrode is vertical or parallel to one of the four edges or extending toward one of the corners.
10. The optoelectronic device according to claim 1 , wherein the channel-connecting portion is located on the middle point of a first edge.
11. The optoelectronic device according to claim 10 , wherein the finger-shaped electrode extends along the first edge to form a double-armed pattern, or toward a second edge which is opposite to the first edge, or toward the corner which is most away from the channel-connecting portion.
12. The optoelectronic device according to claim 1 , wherein the channel is single or plural.
13. The optoelectronic device according to claim 1 , the optoelectronic device further comprises a second metal electrode layer which is electrically connected to the second conductive type semiconductor layer and the second bonding pad, wherein the second metal electrode layer comprises a second pattern and the first pattern is totally overlapped, totally staggered, or patially overlapped to the second pattern.