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The high on/off-current ratio of microcrystalline-silicon thin-film transistors (TFTs) with vertical offset was demonstrated. These TFTs have a bottom-gate structure and offset regions formed along the side surfaces of the thick interlayer films. Due to a decrease of maximum electric-field intensity and a narrow distribution of high electric field, the on/off current ratio of vertical-offset TFTs is about three orders of magnitude higher than that of conventional TFTs.
Date of Publication: Sept. 2010