Patent ID: 7015058
Filing Date: 2006-03-21
Classification: B82Y,H01S

Abstract:
1. A method for fabricating a semiconductor laser device, comprising a first step of forming a layered structure of a group III nitride semiconductor on a top surface of a substrate of a group III nitride semiconductor, a second step of forming a stripe-shaped laser optical waveguide region in the layered structure, and a third step of forming an electrode on a top surface of the layered structure, wherein, in the first step, the substrate used has a dislocation-concentrated region extending from a bottom surface to a top surface thereof and a low-dislocation region constituting a remaining portion thereof other than the dislocation-concentrated region, in the second step, the laser optical waveguide region is formed right above the low-dislocation region of the substrate, and in the third step, the electrode is formed right above the low-dislocation region of the substrate.