Light emitting diode with ITO layer and method for fabricating the same
View Patent ↗The present invention relates to a light emitting diode with enhanced luminance and light emitting performance due to increase in efficiency of current diffusion into an ITO layer, and a method of fabricating the light emitting diode. According to the present invention, there is manufactured at least one light emitting cell including an N-type semiconductor layer, an active layer and a P-type semiconductor layer on a substrate. The method of the present invention comprises the steps of (a) forming at least one light emitting cell with an ITO layer formed on a top surface of the P-type semiconductor layer; (b) forming a contact groove for wiring connection in the ITO layer through dry etching; and (c) filling the contact groove with a contact connection portion made of a conductive material for the wiring connection.
1. A light emitting device, comprising:
a substrate;
a plurality of light emitting cells arranged on the substrate, wherein each light emitting cell comprises:
a first semiconductor layer and a second semiconductor layer;
an inclined surface; and
a current diffusion layer arranged on the second semiconductor layer;
a first insulation layer arranged on each light emitting cell;
a conductive material arranged on the first insulation layer to couple two of the light emitting cells; and
a second insulation layer arranged on the conductive material,
wherein the current diffusion layer comprises an opening and the conductive material is arranged in the opening, and the conductive material is coupled to the second semiconductor layer of each light emitting cell through the current diffusion layer.
2. The light emitting device of claim 1 , wherein the substrate is exposed between the plurality of light emitting cells, and the first insulation layer is arranged on the exposed portion of the substrate.
3. The light emitting device of claim 1 , wherein the conductive material is coupled to the first semiconductor layer of one of the two light emitting cells through a first opening formed in the first insulation layer, and
wherein the conductive material is coupled to the second semiconductor layer of the other of the two light emitting cells through a second opening formed in the first insulation layer.
4. The light emitting device of claim 1 , wherein the conductive material physically contacts the current diffusion layer and the second semiconductor layer.
5. The light emitting device of claim 1 , wherein the second insulation layer is arranged directly on both the first insulation layer and the conductive material.
6. The light emitting device of claim 1 , wherein the second insulation layer corresponds to a contour of each light emitting cell.
7. The light emitting device of claim 1 , further comprising:
an insulation buffer layer arranged between the substrate and each light emitting cell.
8. The light emitting device of claim 7 , wherein the substrate comprises a conductive substrate.
9. The light emitting device of claim 1 , wherein the inclined surface comprises a side surface of the first semiconductor layer.
10. The light emitting device of claim 9 , wherein the inclined surface comprises a side surface of the second semiconductor layer.
11. The light emitting device of claim 1 , wherein the first insulation layer comprises SiO 2 .
12. The light emitting device of claim 1 , wherein the second insulation layer comprises a moisture proof material.