Hi!
What system of units is used in BSIM?
It seems to be MKS (or SI) but there is a strange divergence about Epsilon:
from eq1 (pic1) we can get:
[epsilon] = 1

but from eq2 it resuls in:
[epsilon] = coulomb/v/m

What is wrong?

eq2 (pic2):

EPSROX is the ratio of the oxide permittivity to that of free space, so it should always appear as EPSROX * Eps0 in equations, eg:

 model->BSIM4coxe = epsrox * EPS0 / toxe;

from the source code (b4temp.c).  Is there a typo in the equation?  Perhaps it used to say EPSOX ( = 3.9 * EPS0 for SiO2) and the equation was changed to EPSROX instead of EPSROX * EPS0 when allowing for other oxides.