| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat release sheet which can efficiently release heat generated from e.g. electronic parts in small electronic apparatuses externally and is inexpensive.SOLUTION: A heat release sheet has a structure in which carbon black is dispersed uniformly among graphite fine particles, and the mass ratio of the graphite fine particle/carbon black is 75/25 to 95/5. The carbon black consists of channel black, Ketjenblack and/or acetylene black. The heat release sheet has a density of 2.0 g/cmor higher and a thermal conductivity of 580 W/mK or higher in the in-plane direction and is obtained by repeating twice or more a step of applying an organic solvent dispersion of the graphite fine particle/carbon black/organic binder to one surface of a die and drying to form a resin-containing composite sheet, baking the resin-containing composite sheet to remove the organic binder and compacting the resultant graphite fine particle/carbon black composite sheet with a press. |
