Semiconductor laser device and optical pickup device

摘要

A semiconductor laser device includes: a semiconductor laser chip (1) which is composed of a semiconductor substrate and a plurality of semiconductor layers stacked on an element formation face of the semiconductor substrate and which outputs an irradiation light for irradiating an optical disk (10); and a light receiving element (2,3) which receives the irradiation light reflected by the optical disk as a feedback light. The semiconductor laser chip includes on one face thereof an electrode (32) facing an optical element (5) and is fixed in a package so that at least one of sub-beams reflected by the optical disk is incident on the one face. A chip exposing portion for exposing a region (33) of the one face where the sub-beam is incident is formed in the electrode (32).