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Three-dimensional TCAD models are used in mixed- mode simulations to analyze the effectiveness of well contacts at mitigating parasitic PNP bipolar conduction due to a direct hit ion strike. 130 nm and 90 nm technology are simulated. Results show careful well contact design can improve mitigation. However, well contact effectiveness is seen to decrease from the 130 nm to the 90 nm simulations.
Date of Publication: Aug. 2007