| 摘要 |
PROBLEM TO BE SOLVED: To restrain generation of a thermoelectromotive force and an electronic drift, and easily carry out inspection and check. SOLUTION: A water-cooling pipe 2 is arranged on one side of a cooling board 3 made of a metal. On the other side of the cooling board 3, a printed circuit board 7 is arranged, with a rubber-like plate 8 having good thermal conductivity provided between the boards. On the printed circuit board 7, an LSI 9 which is susceptible to heat or likely to generate heat is mounted. Over the printed circuit board 7, a metallic box 4 for closing the LSI 9 on the printed circuit board 7 is arranged. The box 4 and the printed circuit board 7 are compression-bonded and fixed to the cooling board 3 by a fixing member 12 such as a screw. |
