Patent ID: 7567602
Filing Date: 2009-07-28
Classification: G11B,H01S

Abstract:
1. A semiconductor laser device comprising: a first lead having a plate-like mounting portion on which a semiconductor laser chip is mounted and a lead portion extending from the mounting portion; a second lead extending along the lead portion of the first lead; and a retention portion made of an insulative material that integrally retains the first lead and the second lead, wherein the retention portion includes a frame member disposed on a semiconductor laser chip side of the first lead, and the frame member has a window portion for emitting laser light from the semiconductor laser chip; a cap to be fit in the frame member of the retention portion; and a pressure contact structure that urges the frame member of the retention portion against the cap, and vice versa, in a direction parallel to an optical axis of the semiconductor laser chip so as to bring the frame member and the cap in pressure contact with each other when the cap is fit in the frame member of the retention portion, wherein the cap has one or more projections that project in a direction parallel to the optical axis of the semiconductor laser chip, the frame member of the retention portion has one or more recess portions receding in the direction parallel to the optical axis of the semiconductor laser chip, and