Thin and flexible substrates are urgently needed to realize new applications for LCD- and OLED displays. The use of polymer foils is limited due to high permeation rates for oxygen and water and complicated coatings are needed to reduce the permeation rate. On the other hand even ultra thin glass has excellent barrier properties but limitations regarding mechanical stability. The developed thin glass-polymer systems with a thickness range from 100-50 μm show excellent barrier properties combined with sufficient bending property to shape displays for various applications. An organic polymer coating on the ultra thin glass by means of dipping or spin coating improves significantly the mechanical stability of the thin glass. Thus, the thin glass-polymer substrates can be used in conventional cleaning and ITO process lines. The influence of various coatings on the mechanical properties is shown.