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FinFET model parameter

Saeed Gharagoz
I have a FinFET model parameter and I need to use to simulate a circuit. How can I do it? Should I only change the file extension from .pm to .scs and copy it where everything else is? Or should modify the existing file? And any idea where can I get 22nm MIGFET model? Thanks
  • Vandana, That model that you have obtained from ASU is for HSPICE and as far as I know you cannot use it in spectre! It is similar to a C and C++! You have to modify it so spectre understands the model! If you want do it yourself you need to read the HSPICE manaul and understand the code( specially the linking file) Once you are on top of it you need got through the cadence manual and modify the code so spectre understands it! Let me know how can i help you! Cheers
  • Thanks.
     
    So do you have any idea where from I can get the model for finfet that works with spectre directly. I'm fine with working in 45nm even.
  • Hi Saeed, Could you please let me know how do you simulate a circuit using the finfet models you have? Thanks
  • Hi Saeed, Actually, I have done a lot of simulations using device using TCAD tools (Taurus). But now I am going to use FinFET to do some circuit simulations. Could you please let me know how do you do that? May I have the models you have? Thanks

  • To answer Vandana's question, all you normally need to do is to have a component which netlists with the same model name as in the file (e.g. use analogLib/nmos4/symbol and then set the model name to match the name in the file, and set the w and l appropriately). Then in ADE use Setup->Model Libraries and give the path to the model file. Note that spectre can read SPICE syntax files.

    Note I did need to make a small correction to the file because the syntax was wrong (see earlier my earlier post in the thread on this), and then it worked OK.

    Normally you'd have a design kit which takes care of the mapping between symbols and model files, but in the absence of this using analogLib components would be OK.

    Regards,

    Andrew.

  • I need to know your email account and I only have the 45nm FinFET model! cheers
  • Thanks. My emails address: moradifarshad@gmail.com Could you please let me know if you have used them for circuit simulations also? Thanks Best

  • Hello~I download 32nm model of finfet from website http://ptm.asu.edu/.

    .param pnch = 2e16                       nch = ??? (what nch means?)
    .param ptox = 1.4e-9     we know  tox = Oxide thickness
    .param ptsi = 'tbsi'                           tsi = Fin thickness
    .param ptbox = 1.4e-9                   
    .param npvthf0 = 0.29                     npvthf0 = ???
    .param npvthb0 = 0.29
    .param esi = 11.7                            esi = ???
    .param eox = 3.9                             eox = ???
    .param nlambda1 ='(-1)*(ptox/(ptbox+ptsi/(esi/eox)))'
    .param nlambda2 ='(-1)*(ptbox/(ptox+ptsi/(esi/eox)))'

    .param delta1 = 0.008
    .param delta2 = 0.008

    .param Voff2=-0.09
    .param N = 0.2
    .param Vt = 0.0259
    .param Voff1 = 0.0

    I have a FinFET model parameter and I want to use to simulate a circuit.

    I want to change some parameters from the table. (like  .param ptox = 1.4e-9 => .param ptox = 1.6e-9)  How can I do it?

  • Hi Mr. Beckett,

     

    I've try to do the same, but I get an error about the level of the model cards:

     ERROR (SFE-1138): "*********20nfet.pm" 4: Model `nfet': nmos level 72 is not supported. 

    Actually, the model file starts with following:

    .model nfet nmos level = 72 

    Thanks in advance for your help

    Regards,

     

    Laurent  

  • Laurent,

    You need to use MMSIM10.1 or MMSIM11.1 - you must be using too old a version. I just tried a very simple model card with level=72 and it is correctly recognized as bsimcmg in either of these two versions. I know that early MMSIM10.1 versions didn't recognize level 72. For the versions I had available to test, it works in  10.1.1.181.isr12 but not 10.1.1.070.isr6 - so it changed somewhere between the two.

    Regards,

    Andrew.

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