Patent ID: 8802468

Claim:
A fabrication method for a semiconductor light emitting device, comprising: forming a lower cladding layer over a GaAs substrate; forming an active layer over the lower cladding layer; forming an InGaAs etching stop layer on a GaAs layer or an AlGaAs layer, the InGaAs etching stop layer having a band gap greater than that of the active layer over the active layer; forming an AlGaAs upper cladding layer on the InGaAs etching stop layer; exposing the InGaAs etching stop layer by selectively etching the AlGaAs upper cladding layer; and removing the InGaAs etching stop layer exposed by the etching, wherein a ridge structure formed in the exposing and the removing includes the AlGaAs upper cladding layer and the InGaAs etching stop layer, and the upper side of the GaAs layer or the AlGaAs layer is exposed on opposite sides of the ridge structure.