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Three-dimensional dielectric characterization of polymer films

✍ Scribed by Kaushal S. Patel; Paul A. Kohl; Sue Ann Bidstrup-Allen

Publisher
John Wiley and Sons
Year
2001
Tongue
English
Weight
159 KB
Volume
80
Category
Article
ISSN
0021-8995

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✦ Synopsis

Abstract

Polymer films are widely used in electronic packaging applications due to their low dielectric constant and ease of fabrication. These films often exhibit anisotropic electrical and thermomechanical properties, due to orientation of polymer chains, which need to be evaluated for performance and reliability modeling of electronic packages. This article presents a dual‐capacitor technique to measure the anisotropic dielectric permittivities of such films. Results are reported for in situ measurements for several spin‐coated polymeric films, some of which exhibit different permittivities in the in‐plane (x and y) and the through‐plane (z) directions (transversely isotropic), and free‐standing liquid crystalline Vectran films which exhibit orthotropic permittivities. Β© 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 2328–2334, 2001

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