SEMICONDUCTOR LASER DEVICE

PROBLEM TO BE SOLVED: To provide a semiconductor laser device with a highly reliable ridge waveguide structure by reducing distortion applied to the ridge waveguide while keeping productivity. SOLUTION: An electrode formed on a submount 2 is separated into an electrode 4 connected with the ridge waveguide, and electrodes 5 connected with an element electrode of a semiconductor laser element 1 formed on both sides of the waveguide, with a partial connecting region left over. The ridge waveguide is connected with the corresponding electrode 4 via a thick Au film, and only an element electrode is fixed and joined to the corresponding electrodes 5 via solder 6, thereby preventing the solder 6 from flowing out to the waveguide part. Thus, the semiconductor laser device with a highly reliable ridge waveguide structure can be provided by reducing the distortion applied to the ridge waveguide and keeping heat dissipating efficiency of the waveguide while the productivity is secured. COPYRIGHT: (C)2008,JPO&INPIT