Z-Axis Anisotropic Electrically Conducting Polymer-Matrix Composite Film

[+] Author and Article Information
L. Li, D. D. L. Chung

Composite Materials Research Laboratory, State University of New York at Buffalo, Buffalo, NY 14260-4400

J. Electron. Packag 119(4), 255-259 (Dec 01, 1997) (5 pages) doi:10.1115/1.2792246 History: Received July 15, 1996; Revised November 01, 1996; Online November 06, 2007


A z-axis anisotropic electrically conducting polymer-matrix composite film was developed. It comprised 25 volume percent copper coated polyether sulfone particles and a polyimidesiloxane matrix. Each particle protruded from both sides of the film and provided a conducting path along the z-axis. A z-axis pressure of 40 kPa resulted in a z-axis electrical resistivity of 2 Ω · cm for the overall film (i.e., 0.5 Ω · cm for a conducting path); subsequent pressure removal caused the resistivity to rise to 7 Ω · cm only. The film exhibited negligible stress relaxation and a low modulus of 1.67 GPa.

Copyright © 1997 by The American Society of Mechanical Engineers
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