Abstract: A method for producing a heat transfer sheet, includes: (A1) forming a mixture including at least one of a carbon fiber and a boron nitride flake, an inorganic filler, and a binder resin into a molded body in which the at least one of the carbon fiber and the boron nitride flake is oriented in a thickness direction of the molded body; (B1) slicing the molded body into a sheet shape to obtain a molded sheet; (C1) pressing the molded sheet; and (D1), after the pressing, inserting the molded sheet between films and performing a vacuum packing of the molded sheet with the films such that an uncured component of the binder resin present inside the molded sheet is exuded to a surface of the molded sheet, which is the heat transfer sheet.

Abstract: A thermal conductive sheet includes a cured product of a resin composition containing carbon fiber, an inorganic filler other than carbon fiber, and binder resin. The tack force of the sheet surface is 100 gf or greater, determined when the sheet between release films is subjected to press processing at 0.5 MPa for 30 sec, and after the films are peeled off, is indented by 50 ?m at 2 mm/second with a probe 5.1 mm in diameter and the probe is pulled away at 10 mm/sec. Additionally, (B/A)×100?80% is true, where A denotes the tack force of the sheet surface after the films are peeled off subsequent to press processing; and B denotes the tack force of the sheet surface when the sheet is indented by 50 ?m at 2 mm/second with a probe 5.1 mm in diameter and the probe is pulled away at 10 mm/second after exposure to atmosphere for 1 hour subsequent to press processing.