Hi,
I'm using Synopsys Sentaurus for the analysis of the impact of particle strikes on MOS devices. Therefore, I'm applying the Heavy Ion Model and transient simulations. Further, I intend to add a density gradient model (using the eQuantumPotential switch in Physics and solve sections).
If the ' eQuantumPotential' option is switched off, the transient simulation passes without any problems.
However, if 'HeavyIon' and 'eQuantumPotential' are switch-on together, I run into convergence problems. I tried already to improve the mesh ("Mesh refinement") and reduce the step size (down to 1e-18), though, without any success.
Hence my question: Is it in general possible to simulate radiation (using "HeavyIon") while a density gradient model is a applied.
From my Physics section:
Physics {
eQuantumPotential (AutoOrientation Density Resolve)
Recombination ( SRH(DopingDependence) )
Mobility (DopingDependence Enormal HighFieldSaturation)
HeavyIon (
Wt_hi=0.014
LET_f=0.001
Length=10
Time=5.0e-14
Direction=(1,0)
Location=(0.0, 0.14)
Gaussian
PicoCoulomb )
}
From my solve section:
Solve {
Transient(
InitialTime = 0.0
FinalTime = 1e-12
InitialStep=1E-16
MinStep=1E-18
MaxStep=2E-13
Increment=1.1
Decrement=1.5
) { Coupled { Poisson Electron Hole eQuantumPotential} }
Thank you a lot for this very comprehensive material.
Good to know that the answer to my question is a positive one.