THERMALLY-CONDUCTIVE SHEET AND ELECTRONIC DEVICE
A thermally-conductive sheet includes: a binder; and an anisotropic thermally-conductive filler. The anisotropic thermally-conductive filler is oriented in a thickness direction of the thermally-conductive sheet An arithmetical mean height Sa is 5 μm or less and a maximum height Sz is 50 μm or less on either surface of the thermally-conductive sheet. A dielectric breakdown voltage of the thermally-conductive sheet is 0.5 kV/mm or higher.
1 . A thermally-conductive sheet comprising: a binder; and an anisotropic thermally-conductive filler,
wherein the anisotropic thermally-conductive filler is oriented in a thickness direction of the thermally-conductive sheet, and
an arithmetical mean height Sa is 5 μm or less and a maximum height Sz is 50 μm or less on either surface of the thermally-conductive sheet, and
a dielectric breakdown voltage of the thermally-conductive sheet is 0.5 kV/mm or higher.
2 . The thermally-conductive sheet according to claim 1 , wherein the anisotropic thermally-conductive filler comprises at least one of boron nitride, a carbon fiber, and a carbon fiber having an insulating material layer on a surface thereof.
3 . The thermally-conductive sheet according to claim 1 , further comprising at least one of alumina, aluminum nitride, zinc oxide, and aluminum hydroxide.
4 . The thermally-conductive sheet according to claim 1 , wherein the binder comprises silicone.
5 . An electronic device, comprising:
the thermally-conductive sheet according to claim 1 ;
a heating element; and
a heat-dissipating member,
wherein the thermally-conductive sheet is interposed between the heating element and the heat-dissipating member.
6 . The thermally-conductive sheet according to claim 2 , further comprising at least one of alumina, aluminum nitride, zinc oxide, and aluminum hydroxide.
7 . The thermally-conductive sheet according to claim 2 , wherein the binder comprises silicone.
8 . The thermally-conductive sheet according to claim 3 , wherein the binder comprises silicone.
9 . The thermally-conductive sheet according to claim 6 , wherein the binder comprises silicone.