Patent ID: 8735910

Claim:
A light-emitting device comprising: a substrate; a first light-emitting structure on the substrate, the first light-emitting structure comprising a first conductive type semiconductor layer, a first active layer on the first conductive type semiconductor layer, and a second conductive type semiconductor layer on the first active layer; an insulation layer on the first light-emitting structure, the insulation layer being disposed on the second conductive type semiconductor layer; a second light-emitting structure on the insulation layer, the second light-emitting structure comprising a third conductive type semiconductor layer on the insulation layer, a second active layer on the third conductive type semiconductor layer, and a fourth conductive type semiconductor layer on the second active layer; and a common electrode physically and electrically connected to the second conductive type semiconductor layer and the third conductive type semiconductor layer, wherein the common electrode contacts the insulation layer, wherein the common electrode is disposed on at least a portion of top and side surfaces of the second conductive type semiconductor layer, a side surface of the insulation layer, and at least one portion of a side surface of the third conductive type semiconductor layer.