Journal
APPLIED PHYSICS LETTERS
Volume 97, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.3463455
Keywords
composite material interfaces; diamond; electron mobility; grain size; silicon; thermal conductivity; thermal resistance
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Funding
- UCR through ARL/AFOSR [FA9550-08-1-0100]
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The authors report results of experimental investigation of thermal conductivity of synthetic diamond-silicon composite substrates. Although composite substrates are more thermally resistive than silicon at room temperature they outperform conventional wafers at elevated temperatures owing to different thermal conductivity dependence on temperature. The crossover point is reached near similar to 360 K and can be made even lower by tuning the polycrystalline-grain size, film thickness, and interface quality. The reduction of thermal resistance of composite wafers at temperatures, typical for operation of electronic chips, may lead to better thermal management and new phonon-engineered methods for the electron mobility enhancement. (C) 2010 American Institute of Physics. [doi:10.1063/1.3463455]
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