Patent ID: 8236588

Claim:
A method for manufacturing a multi-wavelength integrated semiconductor laser device for emitting laser beams of different wavelengths, the method, in the following order, comprising: a first step of forming a first semiconductor laser multilayer film on a first substrate, the first semiconductor laser multilayer film including an etching stop layer; a second step of forming a second semiconductor laser multilayer film on a second substrate; a third step of forming a ridge waveguide in said second semiconductor laser multilayer film; a fourth step of bonding said first semiconductor laser multilayer film and said second semiconductor laser multilayer film to each other via an adhesive layer made of metal; a fifth step of etching said first substrate to expose said etching stop layer; a sixth step of etching said etching stop layer; a seventh step of forming a ridge waveguide in said first semiconductor laser multilayer film; and an eighth step of etching said first semiconductor laser multilayer film, except a predetermined area including said ridge waveguide of said first semiconductor laser multilayer film.