Patent ID: 8329483

Claim:
A method for manufacturing a bi-section semiconductor laser device, comprising the steps of: (A) forming a stacked structure by stacking on a substrate, in sequence, a first compound semiconductor layer of a first conductivity type composed of a GaN compound semiconductor, a compound semiconductor layer that constitutes a light-emitting region and a saturable absorption region each composed of a GaN compound semiconductor, and a second compound semiconductor layer of a second conductivity type different from the first conductivity type composed of a GaN compound semiconductor; (B) forming a belt-shaped second electrode on the second compound semiconductor layer; (C) forming a ridge structure by etching at least part of the second compound semiconductor layer using the belt-shaped second electrode as an etching mask; and (D) forming a resist layer on the belt-shaped second electrode for forming a separating groove in the belt-shaped second electrode and then forming the separating groove in the belt-shaped second electrode by wet etching using the resist layer as a wet-etching mask so that the separating groove separates the belt-shaped second electrode into a first portion and a second portion.