Patent ID: 8579019
Filing Date: 2013-11-12
Classification: F28D,H01L

Abstract:
1. A heat dissipation device comprising: a base plate; two fin groups, each of the fin groups comprising a plurality of fins extending radially and outwardly from a center thereof; and two heat pipes each comprising an evaporation section engaged with a top surface of the base plate, an arc-shaped condensation section sandwiched between the two fin groups, and an adiabatic section interconnecting the evaporation section and the condensation section; wherein one of the fin groups is stacked on the other fin group, the upper fin group has a discontinuous annular bottom surface, and the lower fin group has a discontinuous annular top surface abutting the discontinuous annular bottom surface of the upper fin group; wherein each of the discontinuous annular top and bottom surfaces of the fin groups rises gradually and continuously along a circular direction thereof.