Patent ID: 7447027

Claim:
A heat dissipation device comprising: a heat sink assembly comprising a base, a plurality of parallel first fins and second fins mounted onto the base, the first fins defining a plurality of channels therebetween; a heat pipe having a first portion and a second portion perpendicularly to the first portion, the first portion of the heat pipe engaged with the base; a plurality of third fins engaging with the second portion of the heat pipe; a fan holder positioned to the base and located at a side of the first fins; and a fan mounted onto the fan holder and beside the first fins; wherein the fan and the first fins are disposed between the second and third fins and wherein the fan is oriented toward the channels of the first fins to entirely impel an airflow generated by the fan to pass through the channels of the first fins; wherein the base comprises a concave portion between first and second fins; wherein the fan holder comprises a main body defining a central opening communicating with the channels of the first fins; and wherein a positioning flange extends from a bottom edge of the main body and is positioned to the concave portion of the base.