| 摘要 |
PURPOSE:To increase the strength of adhesion and to improve the hermetic property by using hard solder for welding a photo receiving window to the casing of a photo trigger thyristor via metallic member. CONSTITUTION:An internal light guide 7 is led to an optical transmission body 10 (light receiving window) through the aperture 9 of the casing 8. The transmission body 10 is fixed to the above-mentioned casing 8 with metallic members 13' and 12. In a structure for transmission body installation thus constructed, using sapphire as the transmission body 10, it is brazed to the metallic member 13' with Ag solder 15 having a welding temperature of 960 deg.C. Next, the metallic member 13' is brazed to a sleeve 12 and the sleeve to the casing 8 with Ag-Cu series alloy solder 16 having a lower welding temperature than that of said solder 15. This method can yield the titled device excellent in adhesion strength and in hermetic holding for a long time. |
