Morphology and Dielectric Property of Cellular Polyimide Films Prepared by Phase Inversion

Abstract:

In order to explore low dielectric polymeric materials, two types of cellular polyimide films with different dianhydride units were prepared by phase inversion method, and their dielectric properties were investigated. Polyimide films with various cellular structures were obtained by controlling coagulation bath compositions and temperatures. The effects of chemical structures, cellular structures on dielectric property of cellular polyimide films were studied. The results showed that all of the cellular polyimide films had lower dielectric constants than the polymer matrix. The dielectric properties were influenced dominantly by the morphologies of the films. Cellular Polyimide films filled with uniform small cellular structures behaved excellent dielectric property compared with those large-pore cellular films. These findings would provide potential application for cellular polyimide films in microelectronic devices.

• Periodical: Advanced Materials Research (Volumes 557-559)
• Pages: 704-707
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.557-559.704
• Online since: July 2012
• Authors: Hui Juan Chu, Hong Liang Wei, Jing Zhu, Bao Ku Zhu, You Yi Xu
• Keywords: Cellular Film, Dielectric Property, Morpholoy, Phase Inversion, Polyimide

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