Patent ID: 8610144

Claim:
A semiconductor light emitting device, comprising: a first conductive type semiconductor layer; an active layer on the first conductive type semiconductor layer; a second conductive type semiconductor layer on the active layer; an insulating layer on the first conductive type semiconductor layer; an electrode layer on the second conductive type semiconductor layer; a first electrode part configured to electrically connect to the first conductive type semiconductor layer through a first opening, the first opening located in the insulating layer; and a second electrode part configured to electrically connect to the second conductive type semiconductor layer only through a second opening, the second opening being a single opening located in the electrode layer, wherein the second electrode part comprises a second electrode pad with a protrusion, the protrusion including a side surface and a bottom surface, wherein the protrusion has only the side surface contacting the electrode layer, wherein the electrode layer has a first portion and a second portion surrounding the first portion, the second electrode pad overlapping the first portion of the electrode layer, and the second electrode pad having no overlap with the second portion, wherein only the first portion of the electrode layer has the second opening, and wherein the first portion of the electrode layer surrounds the side surface of the protrusion of the second electrode pad in the second opening.