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Ion Implantation of Polypropylene Films for the Manufacture of Thin Film Capacitors

This paper shows that ion implantation into polypropylene films can be used to improve the reliability of thin film capacitors. Hereby, the effect of a significantly reduced water vapor permeability is used. Thin film capacitors of implanted and non-implanted films were manufactured and characterized electrically. Especially climate tests show that implanted film capacitors maintain their capacitance and dissipation factor for a significantly longer period of time.