| 摘要 |
PROBLEM TO BE SOLVED: To keep a solid-state laser crystal coming into thermal contact stably with a metal heat sinks by a method wherein a metal coat high in diffusion bonding properties is provided in the heat exhausting surface of the solid-state laser crystal, and an alloy layer is formed between the metal coat and the metal heat sink. SOLUTION: A metal coat 1 is provided in time heat exhausting side face of a solid-state laser crystal 100, whereby an alloy layer 2 is formed between the metal coat 1 and a metal heat sink 101. The alloy layer 2 is formed through such a manner that the metal coat 1 and the metal heat sink 101 arc pressed against each other as heated to form the alloy layer 2 through diffusion bonding. As mentioned above, the metal coat 1 and the metal heat sink 101 are formed nearly into one piece through the intermediary of the alloy layer 2, whereby the integral structure composed of the metal coat 1 and the metal heat sink 101 is set as high in thermal conductivity as metal to reduce a heat exhaust failure caused by imperfect thermal contact. Moreover, it is preferable that the metal coat 1 is formed of material which is high in thermal conductivity and adhesion to the solid-state laser crystal 100 and comparatively low in fusing point so as to make diffusion bonding take place easily. |
