| 摘要 |
PROBLEM TO BE SOLVED: To provide a semiconductor device storing wiring board capable of maintaining a stable connection state firmly and over a long period of time even for the application of a thermal cycle due to the operation/stop of a semiconductor device for the connection of the wiring board and an outside circuit board. SOLUTION: A radiator 13 comprises the joined body of a metal member and a ceramic member, and when the thermal expansion coefficient of the whole radiator 13 isα1 and the thermal expansion coefficient of an insulation board 5 isα2, the relation ofα1<=α2 is satisfied. |
