Patent ID: 7075178

Claim:
A semiconductor laser comprising: a die pad and a plurality of leads formed by a plate-shaped lead frame; a resin portion, made of a mold resin, that integrally supports the die pad and the plurality of leads; and a laser chip that is mounted on one surface of the die pad, wherein the resin portion has a base portion that integrally holds the plurality of leads, and has a substantially round shape in an external shape thereof, and a die pad holding portion that is continuously formed above the base portion, and holds a rear surface and side portions of the die pad, and has an external shape that is included inside a circle having a diameter smaller than an outer diameter of the substantially round shape of the base portion; wherein the resin portion is formed through a die molding process that is carried out with one face of the lead frame serving as a parting line, and is formed so that an upper surface of the base portion, which is exposed without the die pad holding portion being formed thereon, has a step difference between a surface side and a rear-surface side of the die pad which border at the parting line.