Patent ID: 8866180

Claim:
A light emitting device comprising: a substrate; a light emitting structure layer comprising a first conductive type semiconductor layer, an active layer on the first conductive type semiconductor layer, and a second conductive type semiconductor layer on the active layer; a second electrode on a top surface of the light emitting structure layer; a plurality of first electrodes disposed in the substrate and extended from a lower part of the substrate to a lower part of the first conductive type semiconductor layer, the plurality of first electrodes being disposed under a region of the active layer; a plurality of contact portions having a width greater than a width of each of the plurality of first electrodes disposed in the substrate and disposed at the lower part of the first conductive type semiconductor layer; and a first electrode layer disposed under the substrate and coupled to the plurality of first electrodes, wherein the first electrode layer includes a reflection layer and wherein a bottom surface of the substrate has a width greater than a width of a bottom surface of the first conductive type semiconductor layer in a first direction, wherein a bottom surface of the first electrode layer has a width wider than a width of the top surface of the light emitting structure layer in the same first direction, wherein a top surface of the substrate has an area greater than an area of the bottom surface of the first conducive type semiconductor layer, and wherein each of the plurality of first electrodes are overlapped with different regions of the second electrode in a second direction, the second direction being a vertical direction and perpendicular to the first direction, wherein each of the plurality of first electrodes are provided closer to an edge part of the substrate than to a center region of the substrate, wherein the first electrode layer includes a first region, a second region and a third region which are vertically overlapped with the substrate, wherein the first region is not vertically overlapped with the light emitting structure layer, wherein the second region is not vertically overlapped with the light emitting structure layer, wherein the third region is not vertically overlapped with the light emitting structure layer, and wherein the first region is disposed between the second region and the third region.