Patent ID: 7174955
Filing Date: 2007-02-13
Classification: H01L

Abstract:
1. A heat sink comprising a plurality of cooling fins stacked between two opposite outmost cooling fins and a base attachable to said cooling fins, each of the plurality of cooling fins comprising a main body, wherein at least one side edge of the main body is provided with at least two flanges extending in opposite directions from the main body and successively arranged along a width direction of the main body, one flange defines a hole therein and the other flange has a connecting piece formed therefrom, the free end of the connecting piece forms an engaging piece in alignment with said hole, and the engaging piece of each of the plurality of coaling fins engages in the hole of an adjacent cooling fin whereby the plurality of cooling fins are fastened and joined with each other and wherein the at least two flanges are provided at each of two opposite side edges of the main body, the at least two flanges comprise a first flange and a second flange disposed adjacent to one side of the first flange, the connecting piece projects above the flange from which the connecting piece forms and the base defines a groove for receiving the connecting piece therein when attached thereto to allow the flange to thermally engage with the base.