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DS: Dünne Schichten

DS 15: Oberfl
ächenmodifizierung

DS 15.7: Vortrag

Mittwoch, 10. März 2004, 17:45–18:00, HS 32

Improvement in adhesion of noble metals on polymer surfaces modified with low energy ions — •Jurgita Zekonyte, Sebastian Wille, Ulrich Schürmann, Vladimir Zaporojtchenko, and Franz Faupel — Lehrstuhl für Materialverbunde, Technische Fakult*t der CAU, Kaiserstr. 2, 24143 Kiel

The influence of ion-beam treatment with low energy Ar+, N+ and O+ ions at ion fluences of 10E12 - 10E17 ions/cm2 on the early stage of metal/polymer interface formation, and the adhesion strength of Cu and Au on PS and PP was investigated. The ion bombardment changed the polymer surface chemical structure introducing new oxygen and/or nitrogen containing functional groups, that influenced metal/polymer interaction. Metals of low reactivity such as Cu or Au formed 3D-clusters during the vapour phase deposition. In the case of PS and PP the incomplete condensation was observed on the untreated surfaces at RT. The ion bombardment created a defined concentration of defects that acted as a new adsorption sites on polymer surfaces, leading to an increase in the cluster density with ion fluence, and the enhancement in the condensation coefficient, which approached unity at ion fluence of 10E15 ions/cm2. The surface treatments improved the adhesion between metal and polymer by two orders of magnitude compared to the untreated polymer. The locus of failure changed from interfacial failure for untreated polymer surfaces to cohesive failure, which took place in the polymer, for modified surfaces.