THERMALLY CONDUCTIVE SHEET AND PRODUCTION METHOD FOR THERMALLY CONDUCTIVE SHEET
A thermally conductive sheet includes: a binder resin; and a first thermally conductive filler oriented in a thickness direction of the thermally conductive sheet. The thermally conductive sheet has a contact thermal resistance with regard to an adherend of 0.46° C.·cm 2 /W or less. The first thermally conductive filler is preferably a fibrous thermally conductive filler and/or a flaky thermally conductive filler. The thermally conductive sheet preferably further includes a second thermally conductive filler which is at least one selected from a group consisting of alumina, aluminum, zinc oxide, boron nitride, aluminum nitride, graphite, and a magnetic powder.
1 . A thermally conductive sheet, comprising:
a binder resin; and
a first thermally conductive filler oriented in a thickness direction of the thermally conductive sheet, wherein
the thermally conductive sheet has a contact thermal resistance with regard to an adherend of 0.46° C.·cm 2 /W or less.
2 . The thermally conductive sheet of claim 1 , wherein the first thermally conductive filler is a fibrous thermally conductive filler and/or a flaky thermally conductive filler.
3 . The thermally conductive sheet of claim 1 , further comprising:
a second thermally conductive filler which is ef-at least one type-selected from a group consisting of alumina, aluminum, zinc oxide, boron nitride, aluminum nitride, graphite, and a magnetic powder.
4 . The thermally conductive sheet of claim 1 , wherein the first thermally conductive filler has an insulating coating on a surface thereof.
5 . The thermally conductive sheet of claim 1 , wherein the first thermally conductive filler is an insulation-coated carbon fiber having an insulating coating on a surface thereof, and/or a boron nitride flake.
6 . The thermally conductive sheet of claim 1 , wherein the thermally conductive sheet has a breakdown voltage of 0.50 kV or higher when the thermally conductive sheet has a thickness of 1 mm.
7 . The thermally conductive sheet of claim 1 , wherein the thermally conductive sheet has a thermal resistance of 2.71° C.·cm 2 /W or less.
8 . The thermally conductive sheet of claim 1 , wherein the binder resin is a silicone resin.
9 . The thermally conductive sheet of claim 3 , wherein the second thermally conductive filler is a combination of alumina, aluminum nitride, and zinc oxide; a combination of alumina, aluminum nitride, and aluminum hydroxide; a combination of alumina, aluminum nitride, and boron nitride; or a combination of alumina, aluminum, and graphite.
10 . An electronic apparatus, comprising:
a heat-generating body;
a heat-radiating body;
and the thermally conductive sheet of claim 1 disposed between the heat-generating body and the heat-radiating body.
11 . A production method for a thermally conductive sheet, comprising:
dispersing a first thermally conductive filler in a binder resin to prepare a resin composition for forming a thermally conductive sheet ;
forming a molded block from the resin composition ; and
slicing the molded block into a sheet to obtain the thermally conductive sheet; wherein
the first thermally conductive filler is oriented in a thickness direction of the thermally conductive sheet and the thermally conductive sheet has a contact thermal resistance with regard to an adherend of 0.46° C.·cm 2 /W or less.