Patent ID: 8648369

Claim:
A light emitting device, comprising: a substrate; a first electrode; a first conductivity-type nitride semiconductor layer arranged on the substrate; a second conductivity-type nitride semiconductor layer arranged on the first conductivity-type nitride semiconductor layer, a first surface of the second conductivity-type nitride semiconductor layer comprising a roughened surface; an active layer disposed between the first conductivity-type nitride semiconductor layer and the second conductivity-type nitride semiconductor layer; a reflective metal layer disposed between the first conductivity-type nitride semiconductor layer and the substrate, the reflective metal layer contacting a portion of the first conductivity-type nitride semiconductor layer; a protective metal layer disposed between the reflective metal layer and the substrate, the protective metal layer covering a portion of the reflective metal layer; a first insulating layer covering a portion of the first conductivity-type nitride semiconductor layer and a portion of the protective metal layer; a first connection metal layer electrically connecting the protective metal layer and the first electrode; a bonding metal layer disposed between substrate and the first conductivity-type nitride semiconductor layer, wherein the first electrode is on the same side of the substrate as the roughened first surface of the second conductivity-type nitride semiconductor layer.