Patent ID: 7545645

Claim:
A heat dissipation device comprising: a heat spreader for thermally attaching to a heat-generating electronic component to absorb heat therefrom; a heat pipe having an evaporating section being thermally attached to the heat spreader and a condensing section extending from the evaporating section to a position beyond the heat spreader and thermally connected to a heat sink; a cooling fan for generating forced airflow; and the heat sink having a fin assembly defining a plurality of channels for the airflow flowing therethrough, each of the channels having an air inlet from which the forced airflow enters the heat sink and an air outlet for the forced airflow flowing out the heat sink, along a flowing direction of the airflow a width of the each of the channels between two adjacent fins gradually decreased along an entire length of the each of the channels, the each of the channels having a maximum width at the air inlet and a minimum width at the air outlet.