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The effect of laser pulse length upon laser-induced forward transfer using a triazene polymer as a dynamic release layer

J. SHAW STEWART1,2, R. FARDEL1,2, M. NAGEL1, P. DELAPORTE3, L. RAPP3, C. CIBERT3, A.-P. ALLONCLE3, F. NÜESCH1, T. LIPPERT2,* , A. WOKAUN2

Affiliation

  1. Empa, Swiss Federal Laboratories for Materials Testing and Research, Laboratory for Functional Polymers, Überlandstrasse 129, 8600 Dübendorf, Switzerland
  2. Paul Scherrer Institut, General Energy Research Department, 5232 Villigen PSI, Switzerland
  3. Lasers Plasmas and Photonic Processing Laboratory, CNRS - University of Aix-Marseille, Campus de Luminy - Case 917, 13288 Marseille Cedex 9, France

Abstract

Laser induced forward transfer (LIFT) is a laser direct write technique based on laser ablation. A UV-absorbing triazene polymer (TP) has been used as a sacrificial dynamic release layer (DRL) to propel other materials forward without damage. The effect of different laser pulse lengths (nanosecond and picosecond) on standard frontside TP ablation and backside TP ablation of aluminium thin films has been studied. Whilst the picosecond ablation causes the shock wave and the flyer to be faster, the ablation rate is considerably lower, suggesting an increase in ablation product energies and a decrease in loss mechanisms. The effect of beam energy homogeneity was seen to be an important factor for good flyer generation..

Keywords

Laser forward transfer, Triazene polymer.

Submitted at: June 23, 2009
Accepted at: Feb. 27, 2010

Citation

J. SHAW STEWART, R. FARDEL, M. NAGEL, P. DELAPORTE, L. RAPP, C. CIBERT, A.-P. ALLONCLE, F. NÜESCH, T. LIPPERT, A. WOKAUN, The effect of laser pulse length upon laser-induced forward transfer using a triazene polymer as a dynamic release layer, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 3, pp. 605-609 (2010)