Patent ID: 7653099

Claim:
A semiconductor laser device comprising: a semiconductor laser chip for emitting laser light; a stem for supporting the semiconductor laser chip; a plurality of terminal electrodes, inserted in throughholes provided in the stem, for supplying power to the semiconductor laser chip; a cap having an optical window which transmits laser light and being affixed to the stem so as to cover the semiconductor laser chip; and insulation glass provided between the stem and the terminal electrodes, wherein, in the insulation glass, a concentration of silicon fluoride at a surface which is in contact with the ambient gas is 1/10 or less of a concentration of silicon fluoride in the interior of the insulation glass, and wherein, a total amount of silicon fluoride gas which is released when the insulation glass is heated to a temperature of no less than 700° C. and no more than 850° C. is equal to or less than 1.0 μg.