| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat sink for a power module which can realize the more improvement of radiation performance. SOLUTION: A power device is mounted on the surface side of the heat sink 1 for power module, and the heat from the power device is radiated with a cooling medium passing through a cooling passage 1d located inside. A corrugated fin 1a is located in the cooling passage 1d. In the corrugated fin 1a, mountains 21b and valleys 21c which extend in the passing direction of the cooling medium, and the side wall 21a which connects the mountains 21b and the valleys 21c are formed in wave-shape viewing in the passing direction. The fin 21 is composed of the mountain 21b or valley 21c and two adjacent side walls 21a. On each side wall 21a, a number of louvers 31 are formed which at least turn the cooling medium by its passing inside the fin 21. COPYRIGHT: (C)2007,JPO&INPIT |
