Thermal interface materials including electrically-coductive material
A technology of thermal interface materials and conductive materials, applied in circuit thermal devices, modification through conduction heat transfer, reduction of crosstalk/noise/electromagnetic interference (etc.), can solve electronic equipment inefficiency, interfere with electronic equipment operation, electronic circuit Electromagnetic radiation and other problems
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[0025] Example embodiments will be described in detail below with reference to the accompanying drawings.
[0026] Board-level shields effectively block radiated electromagnetic emissions. But board-level shields are not effective thermal interface materials, so thermal issues are a concern. To alleviate thermal issues, holes can be made in the BLS to allow heat to escape. Thermal interface materials (TIMs) can also be used to direct heat to the outside of the BLS. But as the inventors of the present invention realized, the aperture and TIM create an effective channel for electromagnetic interference (EMI) to escape from underneath the BLS.
[0027] Inserting the TIM into the BLS opening increases radiated electromagnetic emissions due to the TIM acting as a channel or waveguide that directs energy to the outside through the BLS opening. Replacing the TIM material with a thermally conductive microwave absorber material did not solve the problem. In the past, thermally cond...
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