Patent ID: 7479406

Claim:
A method of making a circuit board package for dissipating heat from an integrated circuit, comprising: providing a laminated board having at least one through hole formed therein; providing multiple thermal vias in said laminated board around said at least one through hole; coupling an integrated circuit to said laminated board via a thermally conductive material; coupling a thermally conductive heatslug to said laminated board on a side opposite said integrated circuit, wherein said heatslug comprises: at least one stepped portion disposed within said at least one through hole in said laminated board and thermally coupled to said integrated circuit, wherein said stepped portion includes a void on a side opposite said integrated circuit; and at least one substantially thin and flat peripheral portion that extends from said stepped portion and covers an area substantially the size of said integrated circuit, wherein said stepped portion, said peripheral portion, and said thermal vias form a thermal heatpath that conducts heat away from said integrated circuit and along said peripheral portion.