Patent ID: 8002019

Claim:
A heat dissipation device for removing heat from a heat generating electronic device, the heat dissipation device comprising: a base adapted for absorbing heat from the heat generating electronic device; a fin group located on the base, the fin group comprising a first fin group and a second fin group arranged on the first fin group; at least a first heat pipe comprising an evaporating portion sandwiched between the base and the first fin group, a condensing portion sandwiched between the first fin group and the second fin group, and a connecting portion interconnecting the evaporating portion and the condensing portion; and at least a second heat pipe comprising an evaporating portion sandwiched between the base and the first fin group, a condensing portion located on the second fin group, and a connecting portion interconnecting the evaporating portion and the condensing portion thereof; wherein the condensing portion of each of the at least a first and second heat pipes has a U-shaped configuration; and wherein a plurality of grooves is defined on a top of the base and on a bottom of the first fin group for receiving the evaporating portions of the at least a first and second heat pipes, a plurality of grooves is defined on a top of the first fin group and on a bottom of the second fin group for receiving the condensing portion of the at least a first heat pipe, and a plurality of grooves is defined on a top of the second fin group for receiving the condensing portion of the at least a second heat pipe.