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Proceedings Paper

Hole formation process in laser deep drilling with short and ultrashort pulses
Author(s): Taras V. Kononenko; Sergei M. Klimentov; Serge V. Garnov; Vitali I. Konov; Detlef Breitling; Christian Foehl; Andreas Ruf; Joachim Radtke; Friedrich Dausinger
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Paper Abstract

The drilling process in different materials (diamond, steel, ceramics and PMMA) was studied for a large range of pulse lengths from about 100 fs to 10 ns using different approaches. In transparent materials the penetration process was visualized with high-speed video analysis and microscopy. The drilling rate as well as the relation between processing energy density and ablation threshold were determined in situ. The penetration of the laser beam inside the channel and the influence of laser-ignited plasma were investigated by transmission measurements. Mechanisms of energy coupling and heat losses were examined by applying simple analytical calculations. Proposals for the basic understanding of the drilling process are presented.

Paper Details

Date Published: 25 February 2002
PDF: 5 pages
Proc. SPIE 4426, Second International Symposium on Laser Precision Microfabrication, (25 February 2002); doi: 10.1117/12.456901
Show Author Affiliations
Taras V. Kononenko, General Physics Institute (Russia)
Sergei M. Klimentov, General Physics Institute (Russia)
Serge V. Garnov, General Physics Institute (Russia)
Vitali I. Konov, General Physics Institute (Russia)
Detlef Breitling, Univ. of Stuttgart (Germany)
Christian Foehl, Univ. of Stuttgart (Germany)
Andreas Ruf, Univ. of Stuttgart (Germany)
Joachim Radtke, Univ. of Stuttgart (Germany)
Friedrich Dausinger, Univ. of Stuttgart (Germany)

Published in SPIE Proceedings Vol. 4426:
Second International Symposium on Laser Precision Microfabrication
Isamu Miyamoto; Yong Feng Lu; Koji Sugioka; Jan J. Dubowski, Editor(s)

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