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Flexible high barrier materials are needed for the use of future PV module technologies. R2R processes playa key roll for the production of e.g. a-Si, !-Ic-Si, CIS, CIGS or CdTe modules. The requirements for such flexible high barrier materials are very demanding. Permeation values as low as 10-5 g/m2 day for water vapor transition (WVTR) and respectively 10-5 cm3/m2 day atm for oxygen transition (OTR) are needed. The basic way to produce such materials is combining oxide layers (e.g. AIOx, SiOx) and barrier coatings with suitable polymer substrates.

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