Patent ID: 7172017

Claim:
A heat sink comprising: a heat dissipating base, which has a heat conductive element and a heat dissipating shell covering over the heat conductive element the heat conductive element including a heat conductive plate and a heat conductive block, the heat conductive plate and the heat conductive block being separately formed, the heat conductive plate having a top side and a bottom side, the heat conductive block having a flat top side and a flat bottom side, the flat bottom side of the heat conductive block being disposed at the top side of the heat conductive plate and on top of the center of the heat conductive plate, the bottom side of the heat conductive plate being in contact with a heat-producing device; and a plurality of heat dissipating fins, which is installed perpendicular to the flat top side of the heat conductive element, at least one of the plurality of heat dissipating fins being disposed on top of the flat top side of the heat conductive block; wherein the flat bottom side of the heat conductive block has a larger area than the flat top side of the heat conductive block.