Patent ID: 7432591

Claim:
A method of removably attaching a heat sink to a packaged electronic device, such as a plastic ball grid array (PGBA), the method comprising: providing the plastic ball grid array (PGBA) with an electronic chip; providing a heat spreader with a plurality of spaced securing studs positioned and caulked at a periphery edge thereof; providing a plastic mold cover; molding and embedding the heat spreader and studs with the plastic mold cover as a single unit; securing the single molded heat spreader and plastic cover unit to the plastic ball grid array by an adhesive material; and removably attaching the heat sink to the molded single unit by fastening elements to the molded studs; wherein the single molded unit improves the heat dissipation property of the surface of the PBGA package, defines a much stronger structure against screw or mechanical fastening torque, while allowing for more efficient controllable forces or pressures to be applied as the mechanical fastening device is attached to the molded studs to thereby prevent stress and damage to the PBGA package.