Patent ID: 7608326
Filing Date: 2009-10-27
Classification: H01L,H05K,Y10T

Abstract:
1. A thermally conductive composite material for reducing electromagnetic emissions generated by an electronic device, said thermally conductive composite material comprising: a thermally conductive material in particulate form; and an electromagnetic-energy-absorptive material in particulate form, said thermally conductive material and said electromagnetic-energy-absorptive material being suspended within a polymeric base material, said polymeric base material being substantially transparent to electromagnetic energy, said polymeric base material comprising a phase-change material and up to 19.35% by weight of ethylene-vinyl acetate, the phase-change material comprising a paraffin wax or a synthetic wax, wherein the phase-change material has a reflow temperature that allows the thermally conductive material in particulate form that is suspended within the polymeric base material to flow into gaps and thereby at least reduce thermal impedance, wherein said thermally conductive composite material is configured such that when placed between an electronic device and a proximate structure, said thermally conductive material is operable for facilitating transfer of thermal energy from said electronic device and said electromagnetic-energy-absorptive material is operable for reducing electromagnetic emissions generated by the device, and wherein the electromagnetic-energy-absorptive material includes carbonyl iron.