Patent ID: 7428255

Claim:
A semiconductor laser comprising: a die pad and a plurality of leads formed by a plate-shaped lead frame, the die pad having a bottom portion adjacent the leads of the lead frame and a top portion opposite to the leads; a resin portion made of a mold resin that integrally supports the die pad and the leads; and a laser chip that is mounted on a front surface of the top portion of the die pad, wherein the die pad and tips of the leads of the lead frame are not subjected to a forming process in a direction perpendicular to a front-side surface of the lead frame, the resin portion is provided on both of the front surface and an opposite rear surface of the bottom portion of the die pad and the tips of the leads so as to integrally hold the leads and the die pad, while the rear surface of the top portion of the die pad is exposed without being coated with the resin portion, a side portion of the die pad comprises a fin for positioning and/or heat-radiation, the fin including a fin front surface and a fin rear surface that are both exposed without being covered with the resin portion, and wherein a recessed section is formed in the top portion of the rear surface of the die pad, and the resin portion, formed on the front surface of the die pad, is embedded inside the recessed section formed on the rear surface of the die pad through a top end of the die pad, with the resin embedded in the recessed section and the rear surface of the top portion of the die pad being made to substantially the same plane with each other.