Patent ID: 8502265

Claim:
A light emitting device comprising: an active layer including a non-light emitting region and a light emitting region provided around the non-light emitting region, the non-light emitting region including a multi-quantum well having a well layer and a barrier layer, the light emitting region including a multi-quantum well having a well layer and a barrier layer; a first cladding layer provided on a first major surface of the active layer; a pad electrode provided above the first cladding layer so that its center is located near a center of the non-light emitting region as viewed in a direction perpendicular to the first major surface, a planar size of the pad electrode being equal to or smaller than a size of the non-light emitting region; a second cladding layer provided below a second major surface of the active layer opposite to the first major surface of the active layer; a lower current block layer provided below the second cladding layer; a substrate made of a semiconductor; a lower surface electrode having a first layer and a second layer, the first layer being provided below the lower current block layer and the second cladding layer, the second layer being provided on the substrate, the first layer and the second layer being bonded; a bandgap of the well layer in the non-light emitting region being wider than a bandgap of the well layer in the light emitting region and narrower than a bandgap of the first cladding layer; no part of any of the light emitting region being provided below the pad electrode; the first layer of the lower surface electrode reflecting parts of lights from the light emitting region, and the parts of light being transmitted through the non-light emitting region and emitted outward.