Results of studies of silicon−silicon-ultrathin oxide (42 A˚ )−polysilicon structures structures stabile resistant to field damage are presented. It was found that the total recharging of localized electronic states and minority charge carriers, concentrated at the substrate-insulator interface, which occurs with a change in the field voltage and is close to the same characteristic of structures with an oxide thickness of 37 A˚ . The current, flowing through SiO2, in the enrichment state of the semiconductor increases with increasing voltage much more strongly than in the state of depletion. Moreover, the asymmetry of current-voltage characteristics in relation to the polarity of the voltage, falling on the insulator in samples with a thickness of 42 A˚ SiO2 is more pronounced than in structures with an oxide of 37 A˚ . An
explanation for this asymmetry is possible, if the potential relief in the insulator has a maximum, significantly shifted to the oxide−polysilicon interface, and the potential on the branch from
the semiconductor side significantly decreases to the contact with the substrate.