Need help about how to mesh in TCAD-Silvaco

[jihanette]

Hello everyone, please can someone explain to me how we mesh in Atlas or DevEdit of TCAD-Silvaco, For defining mesh in x axis and in y axis, do we use FEM finite element method to make values like the exemple for Atlas: what method do we do to define the loc and spacing ? I need help.

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Code dot - [expand]
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mesh space.mult=4.0 
#
x.mesh loc=0.0  spacing=0.25
x.mesh loc=10.0 spacing=0.25
#
y.mesh loc=0.0   spacing=0.05
y.mesh loc=5.0   spacing=0.2
y.mesh loc=10.0  spacing=0.05

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Thanks;