IdVg, IgVg Curves of 2D MOSFET Simulation

[Jethro Gallardo]

Hi,

Just wondering if anyone already tried deriving IV curves of simple 2D MOSFET using this DevSim. May I see how it is done?

Thanks in advance,
Jethro Gallardo

[Juan Sanchez]

Hi,

Thanks for your interest.

There are a few examples of MOS simulation in:
devsim/examples/mobility

namely,

gmsh_mos2d.py
gmsh_mos2d_kla.py

Note that IV curves may not be as satisfactory without doing some
additional mesh refinement. For basic physics, I recommend the
gmsh_mos2d.py. The gmsh_mos2d_kla.py example adds some surface mobility
models, but there have been complaints about the quality of the IV curves.

There is also:
testing/mos_2d.py

For getting the IV curves out, there are python functions to ramp the
bias which can call back to print out the currents.

For example, in gmsh_mos2d.py

rampbias(device, "gate", 0.5, 0.5, 0.001, 100, 1e-10, 1e30,
printAllCurrents)
rampbias(device, "drain", 0.5, 0.1, 0.001, 100, 1e-10, 1e30,
printAllCurrents)

I have a writeup for doing IV curves for BJT simulation here:

https://github.com/devsim/devsim_bjt_example

which may be a good starting point.

A better approach for mesh refinement is here:
https://github.com/devsim/devsim_misc/tree/master/refinement

Please let me know if you have any more questions.

Regards,

Juan

> --
> You received this message because you are subscribed to the Google
> Groups "DEVSIM TCAD" group.
> To unsubscribe from this group and stop receiving emails from it, send
> an email to devsim+un...@googlegroups.com
> <mailto:devsim+un...@googlegroups.com>.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/devsim/a20eeb15-4093-401c-9e9c-8e4f571cf8fe%40googlegroups.com
> <https://groups.google.com/d/msgid/devsim/a20eeb15-4093-401c-9e9c-8e4f571cf8fe%40googlegroups.com?utm_medium=email&utm_source=footer>.

[Qiusong Chen]

Hi, there is a example of FET solved by the help of Juan. Please check this link :https://groups.google.com/d/msg/devsim/wPVQTaLYBr0/VE5as55HAAAJ. The example file of mobility in devsim provide typital IV curves of Silicon FET.  I fell the first step  you need to do is creating a proper structure and refine the mesh.