Patent ID: 7585689

Claim:
A method for manufacturing a semiconductor laser device in which a first conductivity type cladding layer, an active layer, a second conductivity type first cladding layer, and a second conductivity type second cladding layer are laminated in this order on a semiconductor substrate by crystal growth, the second conductivity type second cladding layer is processed into a plurality of stripe-shaped ridge structure portions, and a laser bar is formed by cleavage in a direction orthogonal to a longitudinal direction of the ridge structure portions, the method comprising: arranging a plurality of columns of the ridge structure portions that are aligned in the longitudinal direction of the ridge structure portions at predetermined intervals, in a direction perpendicular to the longitudinal direction of the ridge structure portions with spaces therebetween; the arrangement being such that each of the columns is displaced from the column adjacent in the width direction of the ridge structure portions in the longitudinal direction of the ridge structure portions so that an end portion of each of the ridge structure portions and an end portion of the ridge structure portion adjacent in the width direction of the ridge structure portions overlap each other in the longitudinal direction of the ridge structure portions; and cleaving a region where the end portion of each of the ridge structure portions and the end portion of the adjacent ridge structure portion overlap each other.