Patent ID: 8563999

Claim:
A light emitting device, comprising: a first semiconductor layer; an uneven part disposed on a top surface of the first semiconductor layer; a first nonconductive layer including a plurality of clusters on an upper surface of the uneven part; a first substrate layer on a top surface of the first nonconductive layer; a light emitting structure layer including a first conductive type semiconductor layer, an active layer and a second conductive type semiconductor layer on the first substrate layer; a second nonconductive layer between the first substrate layer and the light emitting structure layer; a second substrate layer on an upper surface of the second nonconductive layer; and a second semiconductor layer between the first substrate layer and the second nonconductive layer, wherein the second semiconductor layer is contacted with a top surface of the first substrate layer and a lower surface of the second nonconductive layer, wherein the uneven part includes a material of group III-V compound semiconductor, wherein the first substrate layer includes a different material from the first conductive type semiconductor layer, wherein the first nonconductive layer is disposed between the first substrate layer and the uneven part, and wherein the first substrate layer is disposed between the first nonconductive layer and the light emitting structure layer.