Patent ID: 8368111

Claim:
A semiconductor light emitting device comprising: a light emitting structure including a first conductive semiconductor layer, a second conductive semiconductor layer, and an active layer between the first conductive semiconductor layer and the second conductive semiconductor layer; a first electrode on the light emitting structure; an insulating substrate between the light emitting structure and the first electrode; a plurality of contact protrusions disposed between the first electrode and the first conductive semiconductor layer and directly contacted with the first electrode and the first conductive semiconductor layer; a second electrode under the light emitting structure; and a conductive supporting substrate under the second electrode, wherein the second electrode is disposed between the light emitting structure and the conductive supporting substrate, wherein the insulating substrate includes a plurality of contact grooves in contact with the first electrode and the first conductive semiconductor layer, wherein the first electrode is electrically connected to the first conductive semiconductor layer and the second electrode is electrically connected to the second conductive semiconductor layer, and wherein the conductive supporting substrate physically contacts with the second electrode and has a thickness thicker than that of the insulating substrate, wherein the contact protrusions of the plurality of contact protrusions are disposed in each of the contact grooves, wherein the insulating substrate includes a plurality of inner portions between the plurality of contact protrusions.