Patent ID: 7522643

Claim:
A semiconductor laser apparatus comprising: a metal body which is constituted by a plurality of copper-made members and in which a flow channel is provided, said copper-made members having conductor holes at positions where said flow channel is not formed and where said conductor holes overlap each other when said copper-made members are laminated; an adhesive interposed between said plurality of copper-made members; diamond-like carbon layers each continuously coating the surfaces of each of said copper-made members constituting said metal body while an exposed region set on said metal body and inner walls of said conductor holes are left; a penetrating conductor which penetrates through said conductor holes of said copper-made members while being in direct contact with each of said inner walls of said conductor holes; a semiconductor laser element mounted on the exposed region; and a power source, for supply a drive current to said semiconductor laser, being electrically connected to said penetrating conductor.