Patent ID: 8374207

Claim:
A semiconductor laser device comprising: a semiconductor laser element; a lead including a mount surface for supporting the semiconductor laser element; a first packaging member including a first wall and a second wall spaced from each other in a first direction that is along the mount surface and crosses a laser beam emission direction of the semiconductor laser element, with the semiconductor laser element arranged between the first and the second walls; and a second packaging member pressed in between the first and the second walls and facing the mount surface and the semiconductor laser element, wherein the second packaging member entirely covers the semiconductor laser element as viewed in a second direction that is perpendicular to both the laser beam emission direction and the first direction, wherein the second packaging member includes a first side surface and a second side surface spaced from each other in the first direction, the first side surface being formed with at least one first projection protruding in the first direction and coming into engagement with the first wall, the second side surface being formed with at least one second projection protruding in the first direction and coming into engagement with the second wall, and wherein the first projection and the second projection are configured to protrude oppositely to each other and disposed at respective positions overlapping each other as viewed in the first direction.