PRODUCTION METHOD FOR THERMALLY CONDUCTIVE PRESSURE-SENSITIVE ADHESIVE LAMINATED SHEET, THERMALLY CONDUCTIVE PRESSURE-SENSITIVE ADHESIVE LAMINATED SHEET, AND ELECTRONIC DEVICE

摘要

A production method for a thermally conductive pressure-sensitive adhesive laminated sheet (F) comprising a thermally conductive pressure-sensitive adhesive layer and a thermal diffusion layer having a thermal conductivity in the plane direction of at least 10 W/(m·K), said production method including: a polymer gel-containing dispersion liquid preparation step in which a crosslinked body-containing polymer composition (A) containing a thermally-conductive filler (C1) and a (meth) acrylate ester polymer (A0) is immersed in a solvent and agitated, and a polymer gel-containing dispersion liquid is prepared; a filtration step in which the polymer gel-containing dispersion liquid is filtered using a mesh having prescribed mesh openings and a filtrate is obtained; a coating step in which the filtrate is coated on at least one surface of the thermal diffusion layer to a prescribed thickness; and a solvent removal step in which the solvent in the filtrate upon the thermal diffusion layer is removed and the thermally conductive pressure-sensitive adhesive layer is obtained. The production method for a thermally conductive pressure-sensitive adhesive laminated sheet (F) is characterized by: the prescribed mesh openings being no more than 1.3 times the prescribed thickness; and the gel fraction of a post-filtration crosslinked body-containing polymer composition (H), obtained by drying the filtrate obtained by supplying the crosslinked body-containing polymer composition (A) to the polymer gel-containing dispersion liquid preparation step and the filtration step, being at least 75 mass%.