Patent ID: 8053792

Claim:
A semiconductor light emitting device comprising: a substrate; an N-type first semiconductor layer on the substrate; a light emitting structure on a first area of the N-type first semiconductor layer; a protection device structure on a second area of the N-type first semiconductor layer; and a first electrode layer on the protection device structure, wherein the light emitting structure comprises: an N-type second semiconductor layer on the first area of the N-type first semiconductor layer; an active layer on the N-type second semiconductor layer; and a P-type first semiconductor layer on the active layer, wherein the protection device structure comprises: a P-type second semiconductor layer on the second area of the N-type first semiconductor layer; and an N-type third semiconductor layer on the P-type second semiconductor layer, and wherein the N-type first semiconductor layer, the P-type second semiconductor layer, and the N-type third semiconductor layer form an N-P-N junction, and when a reverse ESD is applied to the first electrode, the reverse ESD flows and dissipates through the N-P-N junction.