Patent ID: 8756811

Claim:
A heat sink ( 1 ) having heat-dissipating fins ( 30 ) capable of increasing heat-dissipating area, comprising: a heat pipe ( 20 ) having a heat-absorbing section ( 21 ) and a heat-releasing section ( 22 ) extending from the heat-absorbing section ( 21 ); and a plurality of heat-dissipating fins ( 30 ) each having a lower plate ( 31 ) and an upper plate ( 32 ) extending from the lower plate ( 31 ), the upper plate ( 32 ) being folded to form an overlapping portion attached on the lower plate ( 31 ), thereby forming a heat-dissipating path (b) between the lower plate ( 31 ) and the upper plate ( 32 ) at a folding area, wherein a through-hole ( 33 ) is formed in the lower plate ( 31 ) and the upper plate ( 32 ) at the overlapping portion, and a periphery of the through-hole ( 33 ) is formed with an inner annular wall ( 311 ) extending from the lower plate ( 31 ), and an outer annular wall ( 321 ) extending from the upper plate ( 32 ) and abuttedly surrounding the inner annular wall ( 311 ), the heat-releasing section ( 22 ) of the heat pipe ( 20 ) penetrating the through-holes ( 33 ) of the heat-dissipating fins ( 30 ) successively so that the inner annular wall ( 311 ) is brought into thermal contact with the heat-releasing section ( 22 ) of the heat pipe ( 20 ).