Patent ID: 8341842
Filing Date: 2013-01-01
Classification: H01L,Y10T

Abstract:
1. A method of manufacturing a heat sink, comprising: providing a plurality of columned fins each having a head and a body extending from the head; providing a base protruding a plurality of studs from a top surface thereof; providing a cover defining a plurality of recesses in a bottom thereof for receiving the heads of the fins and a plurality of orifices thereof for receiving the studs, each head having a height with 0.05-0.15 mm larger than a depth of the corresponding recess of the cover so that a bottom surface of the head extends beyond a bottom surface of the cover, and an annular gap being defined between a periphery of each head and an inside wall in each recess of the cover; pressing the cover and the base to sandwich the heads of the fins therebetween, whereby each head is expanded to fill in the annular gap and contacts the inside wall in the corresponding recess of the cover, and the bottom surface of each head is coplanar to the bottom surface of the cover; and punching the studs of the base to expand studs and cause the studs to intimately engage with the cover.