| 摘要 |
PURPOSE:To prevent creeping up of a brazing material of a stud which is brazed for fixing a radiation fin. CONSTITUTION:A chip 5 is mounted on a cavity 1a, heat generated from a lead base 1 consisting of a ceramic material and the chip 5 is diffused, a radiation fin 2 consisting of a metallic material of good heat conduction and a lower edge face abut to a wall side of the lead base 1 with its back toward the chip 5 and brazed, and an upper part is engaged with an attaching hole 2a shaped in the radiation film 2 and fixes the radiation fin 2. The device is also constituted of a stud 3 which consists of a columnar heat resistant metallic material whereto a plating layer 4 is applied to be wet with a brazing material 6. The stud 3 is constituted to be exposed in its upper part not in its lower part near an edge face. |
