Patent ID: 7417078

Claim:
An electromagnetic wave absorbing heat dissipating device, comprising: a heat generating electronic component which, when operated, generates heat and reaches a temperature higher than room temperature and which generates electromagnetic waves; a heat dissipating component which faces the heat generating electronic component; and an electromagnetic wave absorbing, heat conductive composition positioned therebetween, said composition comprising an organic binder component which is a mixture of copolymers of polymers containing RSiO 3/2 units with R 2 SiO units, wherein R is methyl, phenyl or combinations thereof, with linear polysiloxanes, and an electromagnetic wave absorbing filler, wherein, when the device is in operation whereby the heat generating electronic component generates heat, and reaches a temperature higher than room temperature, and generates electromagnetic waves, the heat causing the organic binder component to fluidize as a low viscosity material, or to soften or to melt to the extent that at least a surface of the composition is fluidized with the result that the composition flows and substantially fills any gaps between the heat generating electronic component and the heat-dissipating component, said composition having a thermal conductivity of at least 0.5 W/mK and a viscosity at 80° C. of 1×10 2 to 1×10 5 Pa·s.