A new method is proposed to investigate charge transport and trapping
in the buried oxide of advanced SOI technologies. This is a concern fo
r hardening studies as well as hot carrier effects, especially for ful
ly-depleted transistors which are sensitive to buried oxide trapping a
nd reliability [1, 2]. The rapid annealing of charges generated in the
buried oxide is determined by measuring the threshold voltage shift o
f the front gate fully-depleted NMOS transistor, thanks to the couplin
g effect with the back interface.