ヒートシンク、その製造方法及び熱交換器

Japanese Patent JP7129875

B2

To provide a heat sink capable of improving production efficiency, having a flatness of a heat generation body mounting face, and improving cooling performance while suppressing increase of a pressure loss, and provide a heat exchanger comprising the heat sink.SOLUTION: A heat sink 1 includes a base plate 2 having a heat generation body mounding face 21 having a rectangular shape; and a plurality of fins 3 arranged on a back surface of the heat generation body mounding face 21. The fin 3 includes: a fin base part 31 projected from the base plate 2; and a plurality of pins 32 projected from the fin base part 31. The fin base part 31 is arranged while having an interval in a first direction X, each other, and is extended to a second direction Y orthogonal to the first direction X. The pins 32 are arranged while having the interval to the second direction Y. An interval Wp of the pins 32 is narrower than the interval Wp of the fin base parts 31, and a ratio of Hb/Hp for a height Hb of each fin base part 31 to a height Hp of each pin 32 satisfies the following equality: 0