Patent ID: 7898809
Filing Date: 2011-03-01
Classification: H01L,Y10T

Abstract:
1. A heat sink comprising: a single monolithic base plate having a plurality of apertures extending through an upper surface and a bottom surface thereof, the bottom surface being adapted for absorbing heat from a heat-generating component; and a plurality of cylindrical pins respectively received in the apertures of the base, the cylindrical pins being adapted for dissipating heat of the base plate to surrounding air, each of the cylindrical pins comprising an upper dissipating portion, a lower mounting portion, and an engaging portion between the dissipating portion and the mounting portion, a diameter of the dissipating portion being larger than a diameter of the mounting portion, the mounting portion being interferentially fitted in a lower part of a corresponding aperture which is adjacent to the bottom surface of the base plate, the engaging portion having a diameter smaller than that of the mounting portion, and the engaging portion being cramped by an interior wall of the base plate defining an upper part of the corresponding aperture which is adjacent to the upper surface of the base plate; wherein each cylindrical pin is elongated, a sum of a length of the mounting portion and a length of the engaging portion is equal to a thickness of the base plate, and a length of the dissipating portion exceeds the thickness of the base plate, the mounting portion being entirely received in the lower part of a corresponding aperture, the engaging portion being entirely received in the upper part of the corresponding aperture, and the dissipating portion protruding out from the base plate entirely.