Patent ID: 8791479
Filing Date: 2014-07-29
Classification: H01L

Abstract:
1. A light emitting device comprising: a first conductive type semiconductor layer; an active layer on the first conductive type semiconductor layer; a second conductive type semiconductor layer on the active layer; a first electrode layer on the first conductive type semiconductor layer; a second electrode layer on the second conductive type semiconductor layer; and a light extraction layer on the second conductive type semiconductor layer, and wherein the second conductive type semiconductor layer includes a first portion having a center area of the second conductive type semiconductor layer and a second portion having an edge area of the second conductive type semiconductor layer, wherein the second electrode layer is in contact with a top surface of the first portion of the second conductive type semiconductor layer, wherein the light extraction layer is disposed on the second portion of the second conductive type semiconductor layer, wherein the light extraction layer includes a first wall, a second wall and a third wall, and wherein at least two of the walls have an inner surface inclined at an acute angle wherein the light extraction layer comprises Al