The Psi-MOSFET offers the most appropriate method for detailed electrical c
haracterization of bare silicon on insulator (SOI) wafers. 2-D and 3-D nume
rical simulations of the Psi-MOSFET are performed in order to validate the
basic principles and to uncover several less obvious aspects: evaluation of
the geometrical factor, distribution of the current lines: influence of th
e sample size and borders proximity. The optimal conditions for accurate op
eration of the Psi-MOSFET are clarified in terms of sample dimensions, prob
e interdistance, film thickness and contact area. (C) 1999 Elsevier Science
Ltd. All rights reserved.