Patent ID: 7918025

Claim:
A method of fabricating a thermal spreading device, the method comprising: forming holes into a substrate in a manner such that a density of an arrangement of the holes is variable over a cross sectional area of the arrangement; wherein the arrangement is configured to form at least one higher density region position to register with at least one higher heat flux area of a chip upon assembly of the thermal spreading device to the chip to form an interface surface of the thermal spreading device and the chip; wherein the arrangement is configured to form at least one lower density region positioned to register with at least one lower heat flux area of the chip upon assembly of the thermal spreading device to the chip; wherein the at least one higher density region has a higher density than the lower density region and the higher heat flux area has a higher heat flux than the at least one lower heat flux area; wherein the at least one higher density region and the at least one lower density region are positioned so as to minimize a disparity in heat buildup at the interface surface between the higher heat flux area and the lower heat flux area; and inserting a thermally conductive rod into each of the holes formed in the substrate, said inserting being effectuated under a compressive force.