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Proceedings Paper

Excimer laser machining of advanced materials
Author(s): Hans Kurt Toenshoff; Ferdinand von Alvensleben; Peter B. Heekenjann; Guido Willmann
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Paper Abstract

In this paper examinations concerning the laser assisted precision cutting and material removal of Al2O3 based printed boards, structuring of SiC-sealing and bearing rings, and ablation of ferrite ceramics are presented. These investigations were performed with 248 nm excimer laser radiation. The required tolerances of the 2D and 3D geometries are smaller than 2 micrometers . Furthermore, the depth of the heat affected zone should be less than 0,5 micrometers and the crack length not greater than the pore diameter of the ceramics, A specially designed machining station and the necessary processing technology will be presented. Further investigation have dealt with the repair and joining of carbon fiber reinforced plastics. Here again, 248 nm excimer laser radiation was used for selectively ablating the epoxy resin without damaging the fibers. Subsequent material examinations show an increased strength of the repassed samples in comparison to unprocessed material.

Paper Details

Date Published: 31 March 1997
PDF: 11 pages
Proc. SPIE 2992, Excimer Lasers, Optics, and Applications, (31 March 1997); doi: 10.1117/12.270088
Show Author Affiliations
Hans Kurt Toenshoff, Laser Zentrum Hannover eV (Germany)
Ferdinand von Alvensleben, Laser Zentrum Hannover eV (Germany)
Peter B. Heekenjann, Laser Zentrum Hannover eV (Germany)
Guido Willmann, Laser Zentrum Hannover eV (Germany)

Published in SPIE Proceedings Vol. 2992:
Excimer Lasers, Optics, and Applications
Harry Shields; Peter E. Dyer, Editor(s)

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