Robustness of Three-Dimensional MOSFETs

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For the future large scale integrated circuit, new transistor with three-dimensional structures will be used in near future. However, variability of transistor characteristics, which is very significant problem on scaling down of device sizes, on the new type transistor has not been known well. In this work, comprehensive study of variability resulted from fluctuations of various device parameters was carried out, and proposed guiding principles for realizing robust transistors for the variability. In addition, a new process technology of silicide electrodes which will be useful to the robust transistors was developed.