Abstract
In this paper we present a generalized scaling theory which allows for an independent scaling of the FET physical dimensions and applied voltages, while still maintaining constant the shape of the electric-field pattern. Thus two-dimensional effects are kept under control even though the intensity of the field is allowed to increase. The resulting design flexibility allows the design of FET's with quarter-micrometer channel length to be made, for either room temperature or liquid-nitrogen temperature. The physical limitations of the scaling theory are then investigated in detail, leading to the conclusion that the limiting FET performances are not reached at the 0.25-µm channel length. Further improvements are possible in the future, provided certain technology breakthroughs are achieved.
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