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Proceedings Paper

Excimer-laser-induced permanent electrical conductivity and nanostructures in polymers
Author(s): Harvey M. Phillips; T. Feurer; S. P. Le Blanc; D. L. Callahan; Roland A. Sauerbrey
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Paper Abstract

The electrical conductivity of high temperature polymers (i.e. polyimide) has been changed permanently from 10-17 (Omega) -1 cm-1 to 10 (Omega) -1 cm-1 by KrF (248 nm) excimer laser irradiation. The conduction mechanism is found to be phonon assisted variable range hopping between small (approximately 10 nm) carbon rich clusters that form a macroscopic percolation cluster. Using a holographic technique, periodic line structures with periods ranging from 166 nm to 950 nm have been produced in polyimide by direct ablation with a KrF excimer laser. Taking advantage of the large nonlinearity in the laser ablation process, linewidths ranging from 30 nm to several hundred nm could be obtained. This technique was combined with the ability to induce electrical conductivity in polyimide to produce an array of 500 nm wide electrically conducting wires. The conductivity of these wires was similar to that found in macroscopic regions of laser induced conductivity.

Paper Details

Date Published: 24 June 1993
PDF: 12 pages
Proc. SPIE 1856, Laser Radiation Photophysics, (24 June 1993); doi: 10.1117/12.147611
Show Author Affiliations
Harvey M. Phillips, Rice Univ. (United States)
T. Feurer, Rice Univ. (United States)
S. P. Le Blanc, Rice Univ. (United States)
D. L. Callahan, Rice Univ. (United States)
Roland A. Sauerbrey, Rice Univ. (United States)

Published in SPIE Proceedings Vol. 1856:
Laser Radiation Photophysics
Bodil Braren; Mikhail N. Libenson, Editor(s)

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