Patent ID: 9444016
Filing Date: 2016-09-13
CPC Classification: H01L

Claim Text:
1. A light emitting device comprising: a reflective layer, wherein a lower edge of the reflective layer has a protruding portion; an ohmic layer disposed on the reflective layer, wherein the reflective layer is thicker than the ohmic layer, wherein a lower edge of the ohmic layer has a protruding portion, and wherein the lower edge of the ohmic layer and the lower edge of the reflective layer are not exposed; a second conductive type semiconductor layer on the reflective layer, wherein the second conductive type semiconductor layer is spaced apart from the reflective layer; an active layer on the second conductive type semiconductor layer; a first conductive type semiconductor layer on the active layer, wherein the first conductive type semiconductor layer includes a recess portion and edge protruding portions on an edge surface, and wherein the recess portion includes a light extraction pattern on a first top surface of the recess portion; a pad electrode on a second top surface of the recess portion, and a branch electrode on the first conductive type semiconductor layer, wherein the reflective layer is on a bottom surface of the second conductive type semiconductor layer, wherein the reflective layer comprises a predetermined pattern, wherein all bottom surface of the pad electrode is vertically overlapped with the predetermined pattern of the reflective layer, wherein the branch electrode is on a third top surface of the first conductive type semiconductor layer, and the branch electrode is physically connected to the pad electrode, wherein the predetermined pattern is further disposed in a region where the predetermined pattern vertically overlaps the branch electrode, wherein the predetermined pattern is disposed below the ohmic layer, and wherein the ohmic layer is between the predetermined pattern and the second conductive type semiconductor such that the predetermined pattern is not in contact with the second conductive type semiconductor layer, wherein the light extraction pattern is not vertically overlapped with the predetermined pattern of the reflective layer, and wherein a depth of the recess is greater than a depth of the light extraction pattern.