  Kink effect is a large obstacle for the cryogenic model of inversion-type
bulk silicon MOSFET devices. This letter used two methods to correct the kink
effect: the modified evolutionary strategy (MES) and dual-model modeling
(BSIM3v3 and EKV2.6). Both methods are based on the principle of kink effect.
The first method considers impact ionization and substrate current induced body
effect (SCBE), and the other considers the change of the freeze-out substrate
potential. By applying the above two methods, kink can be corrected to improve
the agreement between simulation data and measurement data, and obtain more
accurate model parameters. These two methods can be used in further work for
cryogenic device modeling and circuit design.
