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Thin film transistors for foldable displays

We report the first amorphous silicon thin film transistors (TFTs) on flexible, ultra-thin substrates of 25 /spl mu/m thick stainless steel foil. The transistors remain operational under convex or concave bending down to 2.5 mm radius of curvature. The goal of our work is a transistor backplane circuit that can be folded, for use in active matrices in highly rugged and portable applications such as foldable intelligent maps. Our results suggest that such foldable backplane circuits are feasible.