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Excimer Laser Induced Electrical Conductivity in Polymers

Published online by Cambridge University Press:  01 January 1992

H. M. Phillips ,
T. Feurer ,
D. L. Callahan  and
R. Sauerbrey
H. M. Phillips
Affiliation:
Department of Electrical and Computer Engineering Rice Quantum Institute, Rice University, P. O. Box 1892, Houston, TX 77251–1892
T. Feurer
Affiliation:
Department of Electrical and Computer Engineering
D. L. Callahan
Affiliation:
Department of Mechanical Engineering and Materials Science
R. Sauerbrey
Affiliation:
Department of Electrical and Computer Engineering Rice Quantum Institute, Rice University, P. O. Box 1892, Houston, TX 77251–1892
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Abstract

The electrical conductivity of high temperature polymers (i.e. polyimide) has been changedpermanently from 10−17 Ω−1 cm−1 to 10 Ω−1 cm−1 by excimer laser irradiation. The conduction mechanism is found to be phonon assisted variable range hopping between small (∼10 nm) carbon clusters that form a macroscopic percolation cluster. The critical concentration of carbon clusters is found to be Pc = 0.24 ± 0.02 and the critical exponent of the insulator-conductor transition is t = 1.97 ± 0.25.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 285: Symposium I – Laser Ablation in Materials Processing–Fundamentals and Applications , 1992 , 175
Copyright
Copyright © Materials Research Society 1993

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References

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