| 摘要 |
PURPOSE:To obtain a necessary heat dissipation property by providing a heat radiating recess part wherein a core metal which connects the core metal of a metal-core printed wiring board and a heat dissipation material through a screw and the like having good heat conductivity, and providing a through hole formed in said recess part. CONSTITUTION:A heat dissipation recess part 30 which is larger than the diameter of the collor of an attaching screw 50 is formed in a metal-core printed wiring board 100. Thereafter, an inserting hole 35 for the attaching screw 50 is formed at a specified position. Then the metal-core printed wiring board 100 is cut into specified sizes by using a metal mold. An electronic part 40 is mounted. The attaching screw 50 is inserted into the screw inserting hole 35. A thread is formed at the specified position of an aluminum fin 36 of the heat dissipation material. The screw is fixed to the fin 36. The heat generated in the electronic part 40 is dissipated to, e.g., the entire supporting case of the metal-core printed wiring board. which is the heat dissipation material 36, by way of the metal-core printed wiring board 100, the heat dissipation recess part 30, and the screw 50 having the good heat conductivity. |
