| 主权项 |
1. A method of producing a heat conductive sheet, the method comprising the following Steps (A) to (D):
Step (A) a step of dispersing a fibrous filler and a spherical filler in a binder resin to prepare a heat conductive sheet-forming composition; Step (B) a step of forming a molded block using the prepared heat conductive sheet-forming composition; Step (C) a step of slicing the formed molded block to a desired thickness to form a sheet; and Step (D) a step of pressing a sliced surface of the formed sheet, the sliced surface being pressed such that a thermal resistance value of the sheet after pressing becomes lower than the thermal resistance value of the sheet before pressing, wherein the fibrous filler in the Step (A) is a carbon fiber having an average diameter of 8 to 12 μm and an aspect ratio of 2 to 50, amounts of the fibrous filler and the spherical filler added to the heat conductive sheet-forming composition are 16 to 40% by volume and 30 to 60% by volume, respectively, and a thermal resistance value (K·cm2/W) of the sheet before pressing that is formed in the Step (C) is controlled to 0.31 to 1.00. |
