Patent ID: 8847266

Claim:
A semiconductor light emitting device having a conductive substrate, a first conductivity type semiconductor layer, an active layer, and a second conductivity type semiconductor layer sequentially laminated, the semiconductor light emitting device comprising: a first electrode layer formed between the conductive substrate and the first conductivity type semiconductor layer; and a second electrode part including: at least one electrode pad unit extending from an area between the conductive substrate and the first conductivity type semiconductor layer to a top surface of the second conductivity type semiconductor layer through at least one via, which extends from the area between the conductive substrate and the first conductivity type semiconductor layer to the top surface of the second conductivity type semiconductor layer, wherein the top surface of the second conductivity type semiconductor layer is the surface of the second conductivity type semiconductor layer opposite to a bottom surface of the second conductivity type semiconductor layer facing the active layer, at least one electrode extending unit extending from the area between the conductive substrate and the first conductivity type semiconductor layer to the inside of the second conductivity type semiconductor layer, through at least another via, which extends from the area between the conductive substrate and the first conductivity type semiconductor layer to the inside of the second conductivity type semiconductor layer, and an electrode connecting unit connecting the electrode pad unit and the electrode extending unit.