Menu

Discussion Forum

New Discussion
Filtra

Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.

error using SiO2 as dielectric material in mosfet

Posted 7 lug 2014, 12:06 GMT-4 Semiconductor Devices Version 4.4 3 Replies

Anup Kumar
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Hi,

I am getting following error when using SiO2 as dielectric material in mosfet.

Undefined value found.
- Detail: Undefined value found in the equation residual vector.
There are 90 degrees of freedom giving NaN/Inf in the vector for the variable comp1.Ne.
at coordinates: (1.11001e-006,9.94028e-007), (1.13e-006,9.94023e-007), (1.15e-006,9.94019e-007), (1.17001e-006,9.94015e-007), (1.19001e-006,9.94007e-007), ...
There are 90 degrees of freedom giving NaN/Inf in the vector for the variable comp1.Ph.
at coordinates: (1.11001e-006,9.94028e-007), (1.13e-006,9.94023e-007), (1.15e-006,9.94019e-007), (1.17001e-006,9.94015e-007), (1.19001e-006,9.94007e-007), ...
There are 90 degrees of freedom giving NaN/Inf in the vector for the variable comp1.V.
at coordinates: (1.11001e-006,9.94028e-007), (1.13e-006,9.94023e-007), (1.15e-006,9.94019e-007), (1.17001e-006,9.94015e-007), (1.19001e-006,9.94007e-007), ...
- Feature: Stationary Solver 1 (sol1/s1)

I got proper results when I used inbuilt 'Thin insulator Gate' but I need to use SiO2 for gate insulator so that further I can transform it into ISFET.
3 Replies Last Post 8 lug 2014, 14:39 GMT-4
Dennis Brown
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 7 lug 2014, 13:03 GMT-4
I would suggest that if you have a material that works, you should replace each value in the working material with what you want to use, one at a time, and troubleshoot from there. You could also post the material properties and see if somebody knows the answers.
I would suggest that if you have a material that works, you should replace each value in the working material with what you want to use, one at a time, and troubleshoot from there. You could also post the material properties and see if somebody knows the answers.
Anup Kumar
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 8 lug 2014, 03:22 GMT-4
Hi Brown,

Thank you for your reply. But now I am getting the same error for any insulator material and can't do the troubleshoot. Is that error due to some wrong values of material property values or something else?
Hi Brown, Thank you for your reply. But now I am getting the same error for any insulator material and can't do the troubleshoot. Is that error due to some wrong values of material property values or something else?
Dennis Brown
Send Private Message Flag post as spam

Please login with a confirmed email address before reporting spam

Posted: 1 decade ago 8 lug 2014, 14:39 GMT-4
You could post your file and see if anyone else could help. If you had a simulation that worked ok, you should go back to that one and change that one with what you want to do. To me it seems like you are missing something in your material definition. W/o seeing the file I would be guessing. If this is being done in the semiconductor module, I am of very little help because I do not have it. Perhaps screen shots would work ok. Do you get any red flags in the materials section?
You could post your file and see if anyone else could help. If you had a simulation that worked ok, you should go back to that one and change that one with what you want to do. To me it seems like you are missing something in your material definition. W/o seeing the file I would be guessing. If this is being done in the semiconductor module, I am of very little help because I do not have it. Perhaps screen shots would work ok. Do you get any red flags in the materials section?

Note that while COMSOL employees may participate in the discussion forum, COMSOL® software users who are on-subscription should submit their questions via the Support Center for a more comprehensive response from the Technical Support team.

Suggested Content