| 摘要 |
The invention provides a heat sink (1) comprising a heat sink main body (2) in the form of a vertical plate and having a heat receiving portion (3) and a heat radiating portion (4), and radiating fins (5). The heat sink main body (2) has a heat pipe portion (6) comprising a working fluid circuit (61) extending from the heat receiving portion (3) to a lower region (4a) of the heat radiating portion at the lateral side of the heat receiving portion (3) and further to an upper region (4b) of the heat radiating portion which region is positioned at a higher level than the heat receiving portion (3), the working fluid circuit (61) having a working fluid enclosed therein. The portion (61A) of the working fluid circuit provided in the lower region (4a) is smaller than the portion (61B) of the working fluid circuit provided in the heat receiving portion (3) in average channel cross sectional area. The amount of liquid of the working fluid remaining in the circuit portion (61A) in the lower region diminishes to result in high performance at a low cost. <IMAGE> |
