Short-channel BEOL ZnON thin-film transistors with superior mobility performance

This work reports the first experimental submicron and sub-100 nm ZnON TFTs with excellent performance. Field-effect mobility values as high as 55 and 9.2 cm2/V-s were measured from ZnON TFTs with channel lengths of 0.5 μm and 75 nm, respectively. Those are the highest values ever reported on oxide-semiconductor TFTs of comparable channel length. The results confirm ZnON TFTs as an effective building block for the construction of BEOL circuits integrated in a chip.