Combining diamond with silver for heatspreading
Diamond has a high thermal conductivity and a super-low thermal expansion. Combining it with silver, also having a high thermal conductivity, yields an Ag-Dia composite that has a thermal conductivity of 600 W/mK, about 1.5x that of copper, says ALMT Corp. in Tokyo. The firm also makes heatspreaders from a composite of magnesium and silicon-carbide which also provides a high thermal conductivity and is light weight as well. Typical applications are in IGBTs and other power semiconductors.
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