Patent ID: 7296617

Claim:
A heat sink for dissipating heat of an electronic device comprising: a first fin group comprising a plurality of fins stacked together and defining a groove in a lower face thereof, the groove extending through all of the fins of the first fin group; a second fin group comprising a plurality of fins and overlapping the first fin group; a sinuous heat pipe having an evaporating portion; and a heat spreader adapted for contacting with the electronic device, the heat spreader having a bottom face for being attached to the electronic device and a top face opposite to the bottom face, the top face of the heat spreader defining a groove therein corresponding to the groove of the first fin group, the two grooves cooperatively forming a passage in which the evaporating portion of the heat pipe extends; wherein the top face of the heat spreader connects with the lower face of the first fin group and heat in the spreader is transferred to the first fin group through both the heat pipe and the connection between the first fin group and the heat spreader; and wherein the first and second fin groups are respectively engaged with the heat pipe twice at different locations of the first and second fin groups.