US2011094827A1PendingUtilityA1

Heat-conductive noise suppression sheet

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Assignee: TAKAHASHI TOSHIOPriority: Jul 10, 2008Filed: Dec 29, 2010Published: Apr 28, 2011
Est. expiryJul 10, 2028(~2 yrs left)· nominal 20-yr term from priority
Inventors:Toshio TakahashiMasao MatsuiSatoshi MaruyamaKeiichi Araki
H10W 72/877H10W 72/352H10W 72/351H10W 72/325H10W 72/30H10W 42/20H10W 40/258H10W 40/251H10W 40/257H10W 40/10H05K 9/00H05K 7/20
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Claims

Abstract

A heat-conductive noise suppression sheet according to an embodiment includes first ferrite particles, second ferrite particles, a heat-conducting material, and a matrix material. The first ferrite particles are spherical particles having an average particle diameter in the range of 50 μm to 150 μm, the content of the first ferrite particles with respect to the total amount of solid components being in the range of 5 vol % to 25 vol %. The second ferrite particles are irregularly shaped particles having an average particle diameter in the range of 50 μm or less, the content of the second ferrite particles with respect the total amount of solid components being in the range of 5 vol % to 45 vol %.

Claims

exact text as granted — not AI-modified
1 . A heat-conductive noise suppression sheet, comprising:
 first ferrite particles that are spherical particles having an average particle diameter in the range of 50 μm to 150 μm, the content of the first ferrite particles with respect to the total amount of solid components being in the range of 5 vol % to 25 vol %;   second ferrite particles that are irregularly shaped particles having an average particle diameter in the range of 50 μm or less, the content of the second ferrite particles with respect the total amount of solid components being in the range of 5 vol % to 45 vol %;   a matrix material; and   a heat-conducting material.   
     
     
         2 . The heat-conductive noise suppression sheet according to  claim 1 , wherein the content of the first ferrite particles is 10 vol % or more. 
     
     
         3 . The heat-conductive noise suppression sheet according to  claim 1 , wherein the content of the first ferrite particles is 20 vol % or more. 
     
     
         4 . A heat-conductive noise suppression sheet, comprising:
 first ferrite particles that are spherical particles having an average particle diameter in the range of 50 μm to 150 μm, the content of the first ferrite particles with respect to the total amount of solid components being in the range of 20 vol % to 25 vol %;   second ferrite particles that are irregularly shaped particles having an average particle diameter in the range of 50 μm or less, the content of the second ferrite particles with respect the total amount of solid components being in the range of 20 vol % to 35 vol %; and   a matrix material.   
     
     
         5 . The heat-conductive noise suppression sheet according to  claim 1 , wherein the content of the second ferrite particles is 30 vol % or more. 
     
     
         6 . A heat-conductive noise suppression sheet, comprising:
 first ferrite particles that are spherical particles having an average particle diameter in the range of 50 μm to 150 μm, the content of the first ferrite particles with respect to the total amount of solid components being in the range of 20 vol % to 25 vol %;   second ferrite particles that are irregularly shaped particles having an average particle diameter in the range of 50 μm or less, the content of the second ferrite particles with respect the total amount of solid components being in the range of 10 vol % to 20 vol %; and   a matrix material.   
     
     
         7 . The heat-conductive noise suppression sheet according to  claim 1 , wherein the irregularly shaped particles are formed by crushing the spherical particles. 
     
     
         8 . The heat-conductive noise suppression sheet according to  claim 4 , further comprising a heat-conducting material. 
     
     
         9 . The heat-conductive noise suppression sheet according to  claim 8 , wherein the heat-conducting material is aluminum oxide having an average particle diameter in the range of 5 μm to 25 μm, and the content of the heat-conducting material with respect to the total amount of solid components is in the range of 2.5 vol % to 10 vol %. 
     
     
         10 . The heat-conductive noise suppression sheet according to  claim 1 , wherein the matrix material is silicone gel, and the content of the matrix material with respect to the total amount of solid components is in the range of 30 vol % to 57.5 vol %.

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