Patent ID: 8476648

Claim:
A light emitting device, comprising: a plurality of light emitting cells each comprising an N-type semiconductor layer and a P-type semiconductor layer formed on a portion of the N-type semiconductor layer on a substrate, wherein the N-type semiconductor layer of one light emitting cell and the P-type semiconductor layer of another adjacent light emitting cell are connected to each other, and a side surface comprising the N-type or P-type semiconductor layer of the light emitting cell has a slope of approximately 20° to approximately 80° from a horizontal plane based on the substrate, wherein a P-type electrode and a N-type electrode are disposed on the respective P-type semiconductor layer and the N-type semiconductor layer and a transparent layer is disposed on the P-type semiconductor layer, and an ohmic layer is disposed on the transparent layer or the N-type semiconductor layer, respectively, and a portion of the rear surface of the substrate is removed and Al, Ti, Ag, W, Ta, Ni, Ru or an alloy thereof is deposited on the removed portion of the rear surface to enhance a heat dissipation, and wherein an insulation layer is disposed to continuously cover a surface of the substrate, a top and the inclined surface of the light emitting cell.