A physics-based numerical modeling of total ionizing dose effects in CMOS integrated circuits

A physics-based numerical model is proposed as a simulation tool to predict the total ionizing dose response of CMOS integrated circuits. The model includes the radiation-induced charge buildup within both the gate oxide of the standard transistors and the bird's beak parasitic transistor due t...

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Bibliographic Details
Published in2023 Argentine Conference on Electronics (CAE) pp. 41 - 45
Main Authors Cassani, M.V., Salomone, L. Sambuco, Carbonetto, S., Redin, E., Faigon, A., Garcia-Inza, M.
Format Conference Proceeding
LanguageEnglish
Published IEEE 09.03.2023
Subjects
CMOS integrated circuits
MOSFET
MOSFETs
Numerical models
Predictive models
radiation effects
Semiconductor device modeling
solid-state detectors
Total ionizing dose
Transistors
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Summary:A physics-based numerical model is proposed as a simulation tool to predict the total ionizing dose response of CMOS integrated circuits. The model includes the radiation-induced charge buildup within both the gate oxide of the standard transistors and the bird's beak parasitic transistor due to LOCOS isolation method. The zero bias radiation response of standard MOSFETs is simulated, showing the difference between n- and p-channel transistors. For high dose levels, the charge buildup in the parasitic transistor leads to an increase of the off-state leakage current for nMOSFET. The radiation response of an inverter is shown as an example of the consequence this increment of the leakage current may cause to the simple CMOS circuit. The model showed to successfully predict the increment in the delay and the failure of the circuit for high absorbed doses.
DOI:10.1109/CAE56623.2023.10086970