Patent ID: 7532472

Claim:
A heat sink comprising: a central core having a plurality of branches radially extending outwardly from a periphery thereof, wherein a plurality of first imaginary lines corresponding to the branches is each formed by joining a center of a top surface of the core and a crossing point of each branch and the top surface of the core; a plurality of second imaginary lines is each formed by joining the crossing point of each branch and the top surface of the core and an adjacent crossing point of an adjacent branch and the top surface; each branch deviates from a corresponding first imaginary line towards a same side as other branches; wherein a plurality of fins extend from the core and the branches, and a plurality of regions are cooperatively defined by the core and the branches, and the fins have ends thereof defining a plurality of spaced recesses engagingly receiving corresponding catches of a fan bracket; and wherein the branches define a plurality of spaced, half-closed holes each being located between two adjacent fins, a clip being located at a bottom of the heat sink and having screws received in the holes, the clip being adapted for securing the heat sink to a printed circuit board.