Haftfeste Direktmetallisierung von Kunststoffen durch Beschichtung mit Ionen |
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| Authors: | Dr Ralf Bandorf Stefan Waschke Dr Michael Vergöhl Prof Dr‐Ing Guido Grundmeier Prof Dr Günter Bräuer |
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| Affiliation: | Fraunhofer Institut für Schicht‐ und Oberfl?chentechnik IST, Bienroder Weg 54 E, Braunschweig, Germany |
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| Abstract: | Direct metallization of plastics by high powerimpulse magnetron sputtering Even if polymers are today industrially used for decades the direct metallization of plastics is still a hot topic for research and development. Especially in light of the ban of hexavalent chromium an increasing demand for well‐adhering plastic metallization arises. High power impulse magnetron sputtering HIPIMS is a recent technology that can offer a high potential for successfully solving this challenge. This article focuses on the direct metallization of plastics by HIPIMS. In the frame of the investigations any pretreatment was ignored and the different polymers were directly under vacuum metallized. Compared to conventional mid‐frequency sputtering a significant improvement in adhesion was shown for different polymers. In detail the metallization of Plexiglas (PMMA) was investigated, since this polymer is highly challenging with respect to plasma processes. Due to the UV radiation damage of PMMA during plasma deposition direct metallization is usually not possible. Using ionized deposition it was possible to directly metallize the substrates with excellent adhering films without any interface layers or special pretreatments. The characterization of the substrate‐coating interface showed that for the well adhering films a cohesive fracture, i.e. a fracture within the polymer occurred. |
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