Patent ID: 7026711

Claim:
An apparatus, comprising: a device substrate having first and second opposing surfaces, the device substrate comprising a plurality of microelectronic devices; a plurality of electrically conductive members coupled to corresponding ones of the plurality of microelectronics device and extending away from the first surface; a package substrate coupled to the device substrate and having a plurality of electrically conductive traces coupled to corresponding ones of the plurality of electrically conductive members; a spreader substantially comprising an aluminum-copper alloy; at least one first thermally conductive layer interposing the second surface of the device substrate and the spreader and including: a substantially solid layer substantially comprising copper or an aluminum-copper alloy; a thermally conductive adhesive layer contacting the second surface of the device substrate and the substantially solid layer, wherein the thermally conductive adhesive layer substantially comprises a refractory metal; and a thermal adhesive layer contacting the spreader and the substantially solid layer and having one of a substantially viscous gel composition and a liquid composition; at least one stiffener interposing the spreader and the package substrate and substantially comprising a nickel-copper alloy; and at least one second thermally conductive layer interposing the stiffener and the spreader.