Patent ID: 7492596

Claim:
A heat dissipation device for dissipating heat generated by an electronic component mounted on an add-on card, the heat dissipation device comprising: a first heat dissipation unit attached to a top surface of the electronic component and defining a channel therein; a second heat dissipation unit comprising a first portion located at a lateral side of the add-on card, a second portion extending from the first portion to a bottom side of the add-on card, and a joint portion formed between the first portion and the second portion and located at the lateral side of the add-on card; and a heat pipe comprising an evaporating portion received in the channel of the first heat dissipation unit, and a condensing portion extended through the second heat dissipation unit at the joint portion; wherein the first heat dissipation unit comprises a base member and a clamping member positioned on the base member; and wherein the base member defines a semicircular groove at a top side thereof, and the clamping member and the semicircular groove of the base together defining the channel of the first heat dissipation unit.