Patent ID: 6855571

Claim:
A method for fabricating a GaN-based semiconductor laser device comprising the steps of: forming a first GaN-based semiconductor layer on a substrate; forming, on the surface of the first GaN-based semiconductor layer, a mask layer that comprises a striped pattern composed of a plurality of band-like portions that are regularly arranged in the width direction and an alignment pattern formed by altering the regularity of a portion of the plurality of band-like portions; depositing a second GaN-based semiconductor layer on the mask layer by the selective lateral growth method with starting points at portions of the first GaN-based semiconductor layer that are exposed form the mask layer; forming a multi-layered semiconductor that comprises an n-type GaN-based semiconductor layer, an active layer, and a p-type GaN-based semiconductor layer on the second GaN-based semiconductor layer; and forming a current injection region directly above the band-like portion while using the alignment pattern as a reference to position the current injection region.