| 摘要 |
PROBLEM TO BE SOLVED: To reduce ventilating resistance and heat radiation performance in a heat sink made of an extruded aluminum shape material with fins used for an electronic device or an information device incorporating the electronic device, and to reduce the heat sink, the electronic device and the information device in weight by reducing the thickness of each fin within a prescribed range. SOLUTION: A heat sink 1 made of an extruded aluminum shape material with fins is provided with a plate base 2 and parallel fins 3 disposed on one surface thereof. The plate base 2 has a width of 25-400 mm, a length of 25-40 mm and a thickness of 2-5 mm. Each fin 3 has a height of 1-30 mm and a space between the fins 3 is 1-1.9 mm, and each fin 3 has a thickness of 0.1-0.8 mm.
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