STP1141

    Multishot Ablation of Thin Films: Sensitive Detection of Film/Substrate Transition by Shockwave Monitoring

    Published: Jan 1991


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    Abstract

    During multishot ablation with 248 nm excimer laser pulses, for each single laser shot the shock wave emerging from the ablated material was monitored by the acoustic mirage effect. The Shockwave parameters turned out to depend sensitively on the nature of the ablated material. In particular during ablation of a polymeric film/SiO2/Si multilayer system, distinct changes in the deflection signal were found when the ablation was driven through the interface between layers. Inspection by optical microscopy and depth profiling was used as cross check.


    Author Information:

    Hunger, E
    Freie Universität Berlin, Institut für Experimentalphysik, Berlin,

    Petzoldt, S
    Freie Universität Berlin, Institut für Experimentalphysik, Berlin,

    Pietsch, H
    Freie Universität Berlin, Institut für Experimentalphysik, Berlin,

    Reif, J
    Freie Universität Berlin, Institut für Experimentalphysik, Berlin,

    Matthias, E
    Freie Universität Berlin, Institut für Experimentalphysik, Berlin,


    Paper ID: STP23635S

    Committee/Subcommittee: F01.06

    DOI: 10.1520/STP23635S


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