AC analysis did not work on Element edge models

[chenq...@gmail.com]

Hello Juan:

While I try to simulate the AC analysis, the Edge model for electric field worked perfectly. But while I replace it with Element model, the capacitor just returns a value of 0. My script is base on the sample from "testing/ssac_cap.py". 

Can you help me how to solve it?

Best regards,

QS.C

[Juan Sanchez]

Hello,

You have discovered an issue. While element models are not supported
with 1D simulation, a simple 2D capacitor example is also not doing the
proper ac analysis, although the reported charge is correct.

This should be easy to fix, and I hope to have a solution by early next
week.

Regards,

Juan

On 9/6/20 8:45 AM, chenq...@gmail.com wrote:
> Hello Juan:
>
> While I try to simulate the AC analysis, the Edge model for electric
> field worked perfectly. But while I replace it with Element model, the
> capacitor just returns a value of 0. My script is base on the sample
> from "testing/ssac_cap.py".
>
> Can you help me how to solve it?
>
> Best regards,
>
> QS.C

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[Juan Sanchez]

Hello,

The issue with element model assembly into the contact equations is fixed.  Please see the following release candidate:

https://github.com/devsim/devsim/releases/tag/v1.4.12-rc3

Please see the added tests mentioned in the release note to compare equation specification differences between edge-based and element edge-based assembly.

Regards,

Juan

Version 1.4.12-rc3

Element assembly for calculation of current and charges from the device into the circuit equation are fixed. These tests are added:

• testing/cap_2d_edge.py
• testing/cap_2d_element.py
• testing/cap_3d_edge.py
• testing/cap_3d_element.py

The edge variant is using standard edge based assembly, and the element variant is using element-based assembly.

[chenq...@gmail.com]

Hi Juan:

Thank you very much for this quick update. It works perfectly. 

Regards,

QS.C