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Physical subthreshold MOSFET modeling applied to viable design of deep-submicrometer fully depleted SOI low-voltage CMOS technology

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2 Author(s)
Ping Chin Yeh ; Dept. of Electr. Eng., Florida Univ., Gainesville, FL, USA ; Fossum, J.G.

An insightful study of the subthreshold characteristics of deep-submicrometer fully depleted SOI MOSFET's, based on two-dimensional numerical (PISCES) device simulations, shows that the gate swing and off-state current are governed by gate bias-dependent source/drain charge sharing, which controls back-channel as well as front-channel conduction. The insight from this study guides the development of a physical, two-dimensional analytic model for the subthreshold current and charge, which is linked to our strong-inversion formalism in SOISPICE for circuit simulation. The model is verified by PISCES simulations of scaled devices. The utility of the model in SOISPICE is demonstrated by using it to define a viable design for deep-submicrometer fully depleted SOI CMOS technology based on simulated speed and static power in low-voltage digital circuits

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Electron Devices, IEEE Transactions on  (Volume:42 ,  Issue: 9 )