Patent ID: 8435869

Claim:
A method for manufacturing a semiconductor device comprising: forming a semiconductor laminated structure on a substrate, wherein the semiconductor laminated structure includes a plurality of semiconductor laser structures; forming first grooves, wherein each of the first grooves has a first depth and a first width in the semiconductor laminated structure, and is located between a pair of the semiconductor laser structures; after forming the first grooves, separating the substrate, along directions transverse to the first grooves, into laser bars, wherein each laser bar includes at least two of the semiconductor laser structures and has opposed side surfaces transverse to resonators of the semiconductor laser structures in the laser bars; forming respective second grooves in the first grooves of a first laser bar of the laser bars, wherein each of the second grooves has a second depth and a second width, the second grooves being transverse to the opposed side surfaces of the first laser bar and spaced apart from the opposed side surfaces of the first laser bar; and dividing the first laser bar into respective semiconductor lasers along the first and second grooves.