Light emitting device, light emitting device package, and lighting system
AssigneeLG Innotek Co., Ltd.
InventorsJoo Yong JEONG, Young Kyu JEONG
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Abstract
Disclosed is a light emitting device. The light emitting device includes a light emitting structure layer including a first semiconductor layer, an active layer, and a second semiconductor layer, an electrode electrically connected to the first semiconductor layer, an electrode layer under the light emitting structure layer, and a conductive support member under the electrode layer. A channel layer is between the second semiconductor layer and the electrode layer. A protrusion projected from at least one of edges of the conductive support member includes and having a rough surface.
Claims20
A light emitting device comprising:
- a light emitting structure layer including a first semiconductor layer, a second semiconductor layer under the first semiconductor layer and an active layer between the first and second semiconductor layers;
- an electrode electrically connected to the first semiconductor layer;
- an electrode layer under the light emitting structure layer;
- a conductive support member under the electrode layer;
- a first protrusion protruded from at least one of edges of the conductive support member;
- and
- a channel layer disposed between a top surface of the conductive support member and a lower surface of the second semiconductor layer,
- wherein the channel layer includes an opening region under the lower surface of the second semiconductor layer and an outer portion extended outward beyond the lower surface of the second semiconductor layer,
- wherein the outer portion of the channel layer is located at a lower position than the lower surface of the second semiconductor layer,
- wherein the first protrusion includes at least one of materials constituting the electrode layer and the conductive support member,
- wherein the first protrusion has a rough surface and is contacted with the channel layer,
- wherein the first protrusion is located at an outer position than a lateral sidewall of the second semiconductor layer.
The light emitting device of claim 11, wherein the channel layer includes a transparent material.
The light emitting device of claim 12, wherein the first protrusion is located at an outer position than the channel layer.
A light emitting device comprising:
- a light emitting structure layer including a first semiconductor layer, a second semiconductor layer under the first semiconductor layer and an active layer between the first and second semiconductor layers;
- an electrode electrically connected to the first semiconductor layer;
- an electrode layer under the light emitting structure layer;
- and
- a conductive support member under a lower surface of the second semiconductor layer,
- wherein the conductive support member includes a first protrusion protruded from at least one of edges of the conductive support member and a recess region recessed inward from at least one of lateral sidewalls of the conductive support member,
- wherein the first protrusion includes at least one of materials constituting the electrode layer and the conductive support member,
- wherein the first protrusion has a rough surface and is located at an outer position than a lateral sidewall of the second semiconductor layer.
Dependencies are inferred from the claim text.