Fabrication of a graphite film based on a polyimide film

摘要

A polyimide film suitable for use in the fabrication of a graphite layer includes a polyimide derived from reaction of diamine monomers with dianhydride monomers, and a foaming agent incorporated in the polyimide. Moreover, a process of fabricating a graphite film includes providing a polyamic acid solution formed by reaction of diamine monomers with dianhydride monomers, incorporating a foaming agent into the polyamic acid solution, forming a polyimide film from the polyamic acid solution, applying a first thermal treatment so that the polyimide film is carbonized to form a carbon film, and applying a second thermal treatment so that the carbon film is converted to a graphite film.