| 摘要 |
PROBLEM TO BE SOLVED: To simply and reliably prevent rotations of a plurality of sheets of heat radiating plate, without preventing surrounding air from being taken in. SOLUTION: In a semiconductor heat radiator, a sheet of heat radiating plate 2 is fixed to a printed wiring board 1, and a remaining heat radiating plate 3 is screwed and fixed at a point and to the heat radiation plate 2 at a fixing side together with a semiconductor 4 for use. A projection part 7 is provided in a specified heat radiating plate 3, and a cutout part 6 mating with the projection part 7 is provided in the remaining heat radiating plate 2, and the projection part 7 mates with the cutout part 6, so that relative rotation between a plurality of the heat radiating plates 2, 3 is prevented.
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