US 12,466,984 B2
Thermally conductive sheet and method for manufacturing same
Hiroki Kudoh, Kawaguchi (JP); and Miho Ishihara, Ibaraki (JP)
Assigned to SEKISUI POLYMATECH CO., LTD., Saitama (JP)
Appl. No. 17/918,217
Filed by SEKISUI POLYMATECH CO., LTD., Saitama (JP)
PCT Filed May 27, 2021, PCT No. PCT/JP2021/020297
§ 371(c)(1), (2) Date Oct. 11, 2022,
PCT Pub. No. WO2021/241714, PCT Pub. Date Dec. 2, 2021.
Claims priority of application No. 2020-094786 (JP), filed on May 29, 2020.
Prior Publication US 2023/0144307 A1, May 11, 2023
Int. Cl. C09K 5/14 (2006.01); B32B 7/12 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/28 (2006.01); B32B 37/15 (2006.01); B32B 38/00 (2006.01); C08J 5/12 (2006.01); C08K 13/04 (2006.01); F28F 21/06 (2006.01); H05K 7/20 (2006.01); C08K 3/38 (2006.01); C08K 7/06 (2006.01); C08K 7/18 (2006.01)
CPC C09K 5/14 (2013.01) [B32B 7/12 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/283 (2013.01); B32B 37/15 (2013.01); B32B 38/0004 (2013.01); C08J 5/12 (2013.01); C08K 13/04 (2013.01); F28F 21/065 (2013.01); H05K 7/20445 (2013.01); B32B 2250/24 (2013.01); B32B 2305/77 (2013.01); B32B 2307/302 (2013.01); B32B 2307/706 (2013.01); B32B 2310/0831 (2013.01); B32B 2383/00 (2013.01); C08J 2383/05 (2013.01); C08J 2383/07 (2013.01); C08K 2003/385 (2013.01); C08K 7/06 (2013.01); C08K 7/18 (2013.01); C08K 2201/001 (2013.01); C08K 2201/014 (2013.01)] 7 Claims
 
1. A thermally conductive sheet comprising a plurality of unit layers, each comprising a silicone resin and a thermally conductive filler, the plurality of unit layers being laminated such that the plurality of unit layers are adhered to each other, wherein
a volume content of the silicone resin is 32% by volume or less,
wherein the thermally conductive filler comprises an anisotropic filler,
wherein the anisotropic filler is oriented in a thickness direction of the sheet,
wherein the anisotropic filler comprises a flaky material,
wherein a normal direction of a flaky plane of the flaky material faces in a lamination direction of the plurality of unit layers,
wherein a content of the flaky material is 120 parts by mass or more per 100 parts by mass of the silicone resin, and
a compressive load at a sheet area of 25.4 mm×25.4 mm when the thermally conductive sheet is 30% compressed from a direction perpendicular to an adhesion plane on which the plurality of unit layers are adhered to each other is 7.0 kgf or less.