Sekisui Chemical Co., Ltd.

Dexerials Corporation

Keisuke Mukasa

Keisuke Aramaki

Yusuke Kubo

A heat transfer sheet includes: at least one of a carbon fiber and a boron nitride flake; an inorganic filler, and a binder resin. The at least one of the carbon fiber and the boron nitride flake is oriented in a thickness direction of the heat transfer sheet. When the heat transfer sheet is in a sealed state under a reduced pressure of 150 to 300 torr for one minute or more and removed from the sealed state, a tack force of the heat transfer sheet satisfies condition 1: the tack force of the heat transfer sheet is 100 gf or more when a probe having a diameter of 5.1 mm presses in the heat transfer sheet at a force of 200 gf at 2 mm/sec and pulls it off at 10 mm/sec.

Heat transfer sheet, method for producing heat transfer sheet, heat transfer sheet package, and method for producing heat transfer sheet package

A method for producing a heat transfer sheet, includes: (A) 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; (B) slicing the molded body into a sheet shape to obtain a molded sheet; (C) pressing the molded sheet; and (D), 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.

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Shimotsuke, Japan

Keisuke Mukasa