Patent ID: 9611414
Date: 2017-04-04
CPC Classifications: C08K,C09K,H01L

Claim:
1. A thermal interface material positionable in proximity to a heat source for thermal dissipation from the heat source and for shielding of electromagnetic interference, said thermal interface material comprising: a polymer matrix; and thermally conductive particulate filler dispersed in said polymer matrix at 40-50% by volume, said particulate filler including substantially spherical alumina particles having an aspect ratio of between 0.8-1.2 and a spherical particle diameter, and platelet particles having a length, a width, and a thickness and a platelet particle diameter, wherein said length and said width are each greater than said thickness, said platelet particles having an aspect ratio of at least 10, a volumetric loading ratio of said platelet particles to said spherical alumina particles being between 0.1:1 and 0.2:1, and a particle diameter ratio of said platelet particle diameter to said spherical particle diameter being between 1:1 and 20:1, said platelet particles consist of boron nitride, wherein said thermal interface material exhibits a thermal conductivity of at least 0.5 W/m*K, and a compressive modulus of less than 5 MPa at 20° C.