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Problem with semiconductor device simulation using COMSOL version 4.0

Posted 1 giu 2010, 11:28 GMT-4 2 Replies

Yulu Che
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Hi,

I am new to comsol.
I am trying to learn how to use comsol version 4.0.
Since I am interested in semiconductor devices simulation, I downloaded two models ( mos_transistor and semiconductor_diode) which are written in version 3.5a.
Everything is ok except that I couldn't plot the IV characteristics.
It looks like there is a problem with evaluating the Lagrange multipliers lm2 and lm3.

The help file is not that helpful for a new user.

Does someone know how to solve this problem?

Thanks

YC
2 Replies Last Post 5 lug 2013, 23:53 GMT-4
Ivar KJELBERG COMSOL Multiphysics(r) fan, retired, former "Senior Expert" at CSEM SA (CH)
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Posted: 1 decade ago 1 giu 2010, 15:04 GMT-4
Hi

You are slightly unluky I believe, today V4.0 is not yet fully up to read in and translate older 3.5 files with all details. Because many things has changed between the two versions, I would say, it's better to start with the examples in V4 for still some weeks-months, until V4.x can read in fully older versions, and/or that COMSOL has managed to translate and rebuild their X tousands models.

But I'm sure you can find some interesting models already implemented in V4 to learn you the skills to get where you want. Starting learning V3.5 now, because of the changes with V4, will be, in my opinion, somewhat confusing for you, if you are a new beginner

Good luck
Ivar
Hi You are slightly unluky I believe, today V4.0 is not yet fully up to read in and translate older 3.5 files with all details. Because many things has changed between the two versions, I would say, it's better to start with the examples in V4 for still some weeks-months, until V4.x can read in fully older versions, and/or that COMSOL has managed to translate and rebuild their X tousands models. But I'm sure you can find some interesting models already implemented in V4 to learn you the skills to get where you want. Starting learning V3.5 now, because of the changes with V4, will be, in my opinion, somewhat confusing for you, if you are a new beginner Good luck Ivar
Md. Nahid Hossain
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Posted: 1 decade ago 5 lug 2013, 23:53 GMT-4
Hello Yulu Che,

I am trying FET simulation in COMSOL 4.0. But, i am not realizing how i can simulate I-V.

Please help.


Nahid
Hello Yulu Che, I am trying FET simulation in COMSOL 4.0. But, i am not realizing how i can simulate I-V. Please help. Nahid

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