| 摘要 |
The invention seeks to provide a heat sink capable of sufficiently lessening the mounting dimensions of coil-shaped heat exchanging fin to offer a wide versatility and a suitable method for manufacturing the heat sink. The heat sink according to the invention comprises a heat exchanging substrate 1 made by forming material having high thermal conductivity into a cylindrical shape, and a heat exchanging fin 2 having coil elements, which is formed by winding a metal wire having high thermal conductivity into a coil and flattening the coil-shaped metal wire in whole with bringing the coil elements in contact with the adjacent ones in their mutually displaced state. The coil fin is secured on the outer surface of the heat exchanging substrate in their wound state.
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