METHOD FOR MANUFACTURING ULTRA-THIN THERMAL DIFFUSION FILM USING EXPANDED GRAPHITE, AND ULTRA-THIN THERMAL DIFFUSION FILM MANUFACTURED THEREBY

摘要

The present invention relates to a method for manufacturing an ultra-thin thermal diffusion film using expanded graphite and to an ultra-thin thermal diffusion film manufactured thereby, and more specifically to a method for manufacturing an ultra-thin thermal diffusion film using expanded graphite and to an ultra-thin thermal diffusion film manufactured thereby in which an expanded graphite/coupling agent compound is produced by coating titanate coupling agent between tabularly structured layers of the expanded graphite, and is applied to the ultra-thin thermal diffusion film, thereby imparting, during rolling of the expanded graphite, uniformity to the surface and consistent thickness thereof due to the improved slip and adhesion properties, which in turn improves thermal and electrical conductivities and electrical shielding property, as well as allows continuous production without tearing when the film is being wound. Additionally, by applying a continuous multi-stage rolling process to the expanded graphite/coupling agent compound, an ultra-thin heat diffusion film having a thickness of 0.03mm or less can be produced, and thus productivity and price competitiveness are superb, and the ultra-thin heat diffusion film can be effectively used in ultra-small electronic devices, slim portable phones and such others.