Patent ID: 8294170

Claim:
A light emitting device comprising: a light-emitting cell disposed on a substrate, the light-emitting cell comprising: a first nitride semiconductor layer comprising a roughened upper surface and an opposing lower surface; a second nitride semiconductor layer; and an active layer disposed between the first nitride semiconductor layer and the second semiconductor layer, wherein, the light emitting cell comprises a hole extending through the second nitride semiconductor layer and the active layer, and exposing a portion of the lower surface of the first nitride semiconductor layer; a reflective layer disposed on the lower surface of the second nitride semiconductor layer; a first insulation layer disposed on the reflective layer and a sidewall of the hole; a connector disposed on the first insulation layer and contacting the exposed portion of the lower surface of the first nitride semiconductor layer; a second insulation layer disposed on the connector; an adhesion layer disposed on the second insulation layer; and a bonding metal layer disposed between the adhesion layer and the substrate.