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Proceedings Paper

A study of angular dependence in the ablation rate of polymers by nanosecond pulses
Author(s): James E. A. Pedder; Andrew S. Holmes
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Paper Abstract

Measurements of ablation rate have traditionally been carried out only at normal incidence. However, in real-world applications ablation is often carried out at oblique angles, and it is useful to have prior knowledge of the ablation rate in this case. Detailed information about the angular dependence is also important for the development of ablation simulation tools, and can provide additional insight into the ablation mechanism. Previously we have reported on the angular dependence of direct-write ablation at 266 nm wavelength in solgel and polymer materials. In this paper we present a systematic study of angular dependence for excimer laser ablation of two polymer materials of interest for microfabrication: polycarbonate and SU8 photoresist. The results are used to improve simulation models to aid in mask design.

Paper Details

Date Published: 1 March 2006
PDF: 9 pages
Proc. SPIE 6106, Photon Processing in Microelectronics and Photonics V, 61061B (1 March 2006); doi: 10.1117/12.659793
Show Author Affiliations
James E. A. Pedder, Imperial College London (United Kingdom)
Andrew S. Holmes, Imperial College London (United Kingdom)

Published in SPIE Proceedings Vol. 6106:
Photon Processing in Microelectronics and Photonics V
David B. Geohegan; Tatsuo Okada; Craig B. Arnold; Frank Träger; Jan J. Dubowski; Michel Meunier; Andrew S. Holmes, Editor(s)

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