Patent ID: 7602051

Claim:
A thermally conductive resin sheet comprising: a substantially planar sheet of a thermosetting resin; and a thermally conductive and electrically insulating inorganic filler, wherein the inorganic filler is a mixture of a flat inorganic filler and a granular inorganic filler, ratio of volume content, V L , of the flat inorganic filler to volume content, V R , of the granular inorganic filler in the mixture is from 30/70 to 80/20, in terms of V L /V R , average particle size, D R , of the granular inorganic filler is from 1 to 6.1 times average major axis size, D L , of the flat inorganic filler, and the flat inorganic filler is dispersed within the substantially planar sheet of thermo-setting resin oblique to the plane of the substantially planar sheet of thermosetting resin.