Structural Design and Research Progress of Thermally Conductive Polyimide Film - A Review.

Abstract

Currently, heat accumulation has seriously affected stabilities and life of electronic devices. Polyimide (PI) film with high thermal conductivity coefficient (λ) has long been held up as an ideal solution for heat dissipation. Based on the thermal conduction mechanisms and classical thermal conduction models, this review presents design ideas of PI films with microscopically ordered liquid crystalline structure which are of great significance for breaking the limit of λ enhancement and describes the construction principles of thermal conduction network in high-λ filler strengthened PI films. Furtherly, the effects of filler type, thermal conduction paths and interfacial thermal resistances (ITR) on thermally conductive behavior of PI film are systematically reviewed. Meanwhile, this paper summaries the reported research and provides an outlook on the future development of thermally conductive PI films. Finally, it is expected that this review will give some guidance to the future studies in thermally conductive PI film. This article is protected by copyright. All rights reserved.