Today ionassisted PVD coating processes are used for a multitude of optical applications in optical thin film technology. They combine the advantages of a low process temperature and a high-energetic film condensation, which is ideal for the coating of plastics. Target of the research work done at the LZH was the realisation of optical functional coatings on PMMA and PC (in reduced extent CR39, PU, PSU) substrates, which also provide a mechanical and a chemical protection. Focal point was the investigation of ionbased coatings with oxide materials, another process variation was a modified IBS process for the production of diamondlike coatings. The employed coating processes comprised ion beam sputtering (IBS) and different ion assisted deposition (IAD) variants. Systematic investigations on cleaning procedures, chemical pretreatment and ion preconditioning of the plastic substrates were performed. Among the evaluated processes IAD provided the best results. The deposition of inorganic coatings on PC, PU, PSU and CR39 was performed without fundamental difficulties, while the realisation of a sufficient adhesion on PMMA was problematic. The utilised approach for PMMA was the deposition of a thin adhesion layer prior to the functional coating, which works simultaneously as an absorber of UV-emission. Substantial for the optimisation of the coating process is the reduction of the process temperature and the process-inherent UV-emission. (orig.)SIGLEAvailable from TIB Hannover: F97B1559+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman
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