Patent ID: 8502193

Claim:
A light emitting device comprising: a support substrate; a wafer bonding layer over the support substrate; a second electrode layer including a current blocking layer and a reflective current spreading layer over the wafer bonding layer; a current injection layer over the second electrode layer; a superlattice structure layer over the current injection layer; a second conductive semiconductor layer over the superlattice structure layer; an active layer over the second conductive semiconductor layer; a first conductive semiconductor layer over the active layer; a light extracting structure layer on the first conductive semiconductor layer, wherein the light extracting structure layer is formed in a concavo-convex structure and a central region of a surface of the first conductive semiconductor layer is exposed; a first ohmic contact electrode layer on the light extracting structure layer and on the surface of the first conductive semiconductor layer in the central region, wherein the first ohmic contact electrode layer corresponding to the light extracting structure layer is formed in a concavo-convex structure; and a first electrode layer on a flat surface of the first ohmic contact electrode layer corresponding to the central region.