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Proceedings Paper

Microstructuring of glass with excimer laser radiation at different processing gas atmospheres for microreaction technology
Author(s): Michael Jacquorie; Ernst-Wolfgang Kreutz; Reinhart Poprawe
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Paper Abstract

Microstructuring of soda lime glass with excimer laser radiation is examined to present its process capabilities for production of surface structures particularly for microreaction technology. Material removal rates, geometries of microstructures and transmission/reflexion of processed soda lime glass are investigated for ArF excimer laser radiation ((lambda) L equals 193 nm, (tau) L equals 20 ns) and KrF excimer laser radiation ((lambda) L equals 248 nm, (tau) L equals 25 ns). Processing of glass at atmospheric pressure down to vacuum at p equals .10 mbar (He as processing gas) is carried out to investigate the correlation between processing gas pressure and generation of debris (solidification of molten material and re-deposition from expanding vapor/plasma). The influence of processing gas atmospheres consisting of He/F2 (50/50 vol.%) with a total pressure in the vacuum chamber of 10 mbar less than p less than 250 mbar on height/width of the debris is examined. Ultrasonic cleaning of glass after processing is investigated for reduction of debris. Optical microscopy, white light interferometry, optical spectroscopy and X-ray photoelectron spectroscopy (XPS) are used for analysis of microstructures and debris.

Paper Details

Date Published: 7 February 2000
PDF: 8 pages
Proc. SPIE 3888, High-Power Lasers in Manufacturing, (7 February 2000); doi: 10.1117/12.377030
Show Author Affiliations
Michael Jacquorie, Technical Univ. Aachen (Germany)
Ernst-Wolfgang Kreutz, Technical Univ. Aachen (Germany)
Reinhart Poprawe, Technical Univ. Aachen (Germany) and Fraunhofer-Institut fuer Lasertechnik (Germany)

Published in SPIE Proceedings Vol. 3888:
High-Power Lasers in Manufacturing
Xiangli Chen; Tomoo Fujioka; Akira Matsunawa, Editor(s)

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