Patent ID: 7440279

Claim:
A heat dissipation device comprising: a heat conducting plate adapted for contacting with an electronic component, the heat conducting plate comprising a groove defined therein; a heat sink mounted on the heat conducting plate; and a heat pipe comprising an evaporating portion sandwiched between the heat conducting plate and the heat sink, and a condensing portion thermally engaging with the heat sink, the evaporating portion comprising a middle portion having a circular cross section and accommodated in the groove of the heat conducting plate, and a pair of end portions formed on opposite sides of the middle portion, each of the end portions having a semi-circular cross section and a flat surface formed thereon; wherein the end portions of the evaporating portion of the heat pipe are located outside two opposite sides of the heat conducting plate, respectively; wherein the heat sink comprises a base facing the heat conducting plate and a plurality of fins mounted on the base; wherein the base comprises a groove defined therein and aligned with the groove of the heat conducting plate to receive the evaporating portion of the heat pipe; and wherein the flat surfaces of the end portions are coplanar with a bottom surface of the heat sink.