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Undefined variable. - Variable: comp1.Ne

Posted Jun 1, 2018, 8:17 a.m. EDT Semiconductor Devices, Mesh, Parameters, Variables, & Functions Version 5.3a 1 Reply

Hirak Chatterjee
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Dear Colleagues, I want to simulate a 3D MOSFET using semiconductor module. But, I am getting this error in the source domain:

Undefined variable.

  • Variable: comp1.Ne

  • Geometry: geom1

  • Boundaries: 23, 34

Failed to evaluate Jacobian of expression.

  • Expression: comp1.Ne

Failed to evaluate Jacobian of expression.

  • Expression: (-comp1.semi.nJntest(comp1.Ne))(dvol)

Please help.

Hirak

1 Reply Last Post Jun 20, 2018, 8:42 a.m. EDT
Chien Liu COMSOL Employee

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Posted: 6 years ago Jun 20, 2018, 8:42 a.m. EDT
Updated: 6 years ago Jun 20, 2018, 10:42 a.m. EDT

Dear Hirak,

3D semiconductor models require swept mesh, as shown in this example:

https://www.comsol.com/model/3d-analysis-of-a-bipolar-transistor-19699

If your license is up to date you can send questions to support@comsol.com

Sincerely,

Chien

Dear Hirak, 3D semiconductor models require swept mesh, as shown in this example: If your license is up to date you can send questions to support@comsol.com Sincerely, Chien

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