▎ 摘　　要

NOVELTY - Polyimide film is obtained by imidizing a polyamic acid solution containing a dianhydride component including benzophenonetetracarboxylic dianhydride (BTDA), biphenyltetracarboxylic dianhydride (BPDA) and pyromellitic dianhydride (PMDA), and a diamine component including m-tolidine and paraphenylene diamine (PPD), and comprises 0.5-2.5 wt.% graphene nanoplatelets. USE - The polyimide film is used in a multilayer film and in a flexible metal clad laminate, which is used in an electronic component (all claimed). The electronic component is used in a communication circuit for a portable terminal, a communication circuit for a computer, or a communication circuit for aerospace. ADVANTAGE - The polyimide film has excellent dielectric properties by using specific components and having a specific composition ratio. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are included for the following: a manufacturing method of polyimide film, comprising (a) preparing a polyamic acid by polymerizing a dianhydride component including BTDA, BPDA and PMDA, and a diamine component including m-tolidine and PPD in an organic solvent, (b) adding and mixing graphene nanoplatelets to the polyamic acid, and (c) imidizing the polyamic acid containing the graphene nanoplatelets; and a flexible metal clad laminate comprising the polyimide film and the electrically conductive metal foil.