Single event charge enhancement in SOI devices

Studies of single-particle ion effects in SOI (silicon-on-insulator) devices show that a new mechanism can contribute to soft error rates: the electron-hole pairs generated in the silicon substrate can charge the back Si-SiO/sub 2/-Si capacitor. An analysis with the 2-D device simulator JUPIN shows that the bulk Si substrate current contribution to the charging current is greater than the normal photocurrent created in the drain-body junction. This current is important in the inversion mode and is still present but reduced in the accumulation mode. An analytical model has been developed to relate the current characteristics to physical parameters of the SOI structure.<
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