Patent ID: 8242483

Claim:
A semiconductor light emitting device comprising: a first electrode; a semiconductor crystal layer arranged on the first electrode, the semiconductor crystal layer having a ridge-shaped structure, wherein an upper surface of the ridge-shaped structure is substantially planar; a semiconductor layer arranged on the upper surface of the ridge-shaped structure, the semiconductor layer having a multilayer structure comprising: a first clad layer; a first light guide layer; an active layer arranged on the first light guide layer; an electron block layer arranged on the active layer; an intermediate layer arranged between the active layer and the electron block layer; a second light guide layer arranged on the electron block layer; and a second clad layer arranged on the second light guide layer, wherein an energy band gap of the second clad layer is greater than an energy band gap of the second light guide layer, and wherein the intermediate layer is configured to reduce stain acting on the active layer or the electron block layer; a waveguide arranged on the semiconductor layer; a current narrowing layer arranged on the waveguide; and a second electrode arranged on the current narrowing layer.