Patent ID: 8263989
Filing Date: 2012-09-11
Classification: H01L

Abstract:
1. A semiconductor light emitting device, comprising: a first semiconductor layer comprising a plurality of concave portions, the plurality of concave portions disposed on an upper portion of the first semiconductor layer; a reflector having a concaved upper surface, the reflector on at least one of the plurality of concave portions of the first semiconductor layer; a plurality of island patterns disposed in an lower portion of the first semiconductor layer; a second semiconductor layer on the first semiconductor layer; an active layer on the second semiconductor layer; and a third semiconductor layer on the active layer, wherein a material of the reflector differs from materials of the first semiconductor layer and the second semiconductor layer, wherein the reflector is disposed between the first semiconductor layer and the second semiconductor layer, wherein the plurality of island patterns are vertically aligned with the plurality of concave portions of the first semiconductor layer, and wherein a lower surface of the second semiconductor layer includes protrusions on the concaved top surface of the reflector, the protrusions protruding toward the first semiconductor layer.