Heat-dissipating sheet having high thermal conductivity and its production method
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United States of America Patent
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Apr 25, 2017
Grant Date -
Nov 5, 2015
app pub date -
Nov 7, 2014
filing date -
May 2, 2014
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Abstract
A heat-dissipating sheet having a density of 2.0 g/cm3 or more and an in-plane thermal conductivity of 580 W/mK or more, which comprises carbon black uniformly dispersed among fine graphite particles, a mass ratio of fine graphite particles to carbon black being 75/25 to 95/5, and the carbon black being composed of channel black and ketjen black and/or acetylene black is produced by applying a dispersion of fine graphite particles, carbon black and an organic binder in an organic solvent to a surface of a die, drying it; burning the resultant resin-containing composite sheet to remove the organic binder; and then pressing the resultant composite sheet of fine graphite particles and carbon black for densification.
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