Summary form only given. Optimum conditions for high-speed (percussion) microdrilling of various polymers using (255 nm) frequency-doubled copper lasers operating at pulse rates up to 20 kHz are well documented, however the optimum renditions for linear cutting, trepanning, scribing or milling have not been explored in such detail. In this paper we report results of experimental investigations of micron precision cutting, trepanning and scribing of PETG, PMMA and other industrial polymers using high-pulse rate UV copper lasers. Typical laser characteristics are 0.7 W average power, diffraction-limited at 255 nm and pulse rates 5-15 kHz. Materials removal (i.e. machine) rates and machine quality (minimum HAZ) have been determined for various combinations of beam/sample scan rate, pulse rate, spot size (and spot overlap) and single-pulse-fluence.


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    Title :

    Optimisation of ablation parameters for direct-write micromachining of polymers using high-pulse-rate UV lasers


    Contributors:
    Illy, E.K. (author) / Withford, M.J. (author) / Brown, D.J.W. (author) / Piper, J.A. (author)


    Publication date :

    1999-01-01


    Size :

    294417 byte




    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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