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Chapter 3
Getting started 2D
In this second example we will refer to the Tutorial 4 (Si n-Mosfet) that you can find
in the Tutorials directory.
Step 1: Modeling the device
Again, as a first step, we have to model the device.
We’ll see in some details how to design and mesh a mosfet device with GMSH.
• In the GMSH script mosfet.geo , several variables are defined and given a value in
this way:
lsub=0.03;
lacc=0.002;
lct=0.0005;
lg=0.0015;
lh=0.01;
lc=0.0005;
these variables are used in the script to assign proper values to the mesh characteristic lengh of the defined Points
Lg_2 = 0.0375;
d = 0.01;
Ls = 0.1;
h = 0.25;
b = 0.0025;
o = 0.005;
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