Hot-Carrier Effect in Submicron pMOSFETs


This paper describes an application of process and device simulation programs in the study of substrate current generated by hot-carrier effect in submicron p-channel MOSFET devices. The impact ionization model for holes was calibrated for accurate simulation of substrate current in submicron devices, and an expression for the impact ionization rate of holes in silicon is obtained. The simulated substrate current for 0.57, 0.73 and 1.13 μm devices obtained by the optimized expression agrees very well with the measured data. The optimized impact ionization expression was also used to simulate the effect of p- Lightly Doped Drain impurity profile on substrate current, and the simulated peak substrate current and the corresponding maximum lateral channel electric field as a function of p- dose and length are presented.

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Saha, S., Yeh, C.S., Lindorfer, P. et al. Hot-Carrier Effect in Submicron pMOSFETs. MRS Online Proceedings Library 391, 21 (1995).

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