Stats

  • Locked Locked
  • Replies 5
  • Subscribers 125
  • Views 2647
  • Members are here 0
This discussion has been locked.
You can no longer post new replies to this discussion. If you have a question you can start a new discussion

Warning about 'virtuosoDefaultExtractorSetup'

Majid Rafei

Hi.

I have added a new technology file (tsmcN90nm), When I want to create new library which is attached to this technology I get the following warnings:

*WARNING* (LCE-2011): Cannot determine the function of layer 'PDKREC' in constraint group 'virtuosoDefaultExtractorSetup' of technology library 'tsmcN90rf'. For accurate results during connectivity extraction, set the function to one of the predefined values and reload the technology library.
*WARNING* (LCE-2012): Cannot find the mask number of layer 'PDKREC' in constraint group 'virtuosoDefaultExtractorSetup' of technology library 'tsmcN90rf'. For accurate results during connectivity extraction, set the layer mask number to a correct value and reload the technology library.
*WARNING* (LCE-2012): Cannot find the mask number of layer 'OD' in constraint group 'virtuosoDefaultExtractorSetup' of technology library 'tsmcN90rf'. For accurate results during connectivity extraction, set the layer mask number to a correct value and reload the technology library.
*WARNING* (LCE-2012): Cannot find the mask number of layer 'NW' in constraint group 'virtuosoDefaultExtractorSetup' of technology library 'tsmcN90rf'. For accurate results during connectivity extraction, set the layer mask number to a correct value and reload the technology library.

Please guide me how to fix this.

  • Hi,

    it seems you do not have the necessary information in your tech file.

    Take a look at the "functions" section:

    I have added something that may match your situation

    functions(
     ;( layer                     function        [maskNumber])
     ;( -----                       --------            ------------)
      ( PDKREC              "recognition"        1            )
      ( OD                        "diff"                     2            )
      ( NW                       "nwell"                  3            )
      ......etc

    This should fix the error messages

     

    Colin

  • Thanks for your reply, I mention that I have not changed any thing in PDK, I have just convert the library from CDB to OA. May it be the reason of this fault?

  • Yes. This is the reason.

    But a 6.1.6 version of the tsmcN90nm library (OA) should be available.

    I recommend you use that rather than translate an old 5.14 library.

    Regards

    Colin

  • OK, the last question, Is this kind of warning critical for designing and layout stages?

  • If you are using VLS-XL, the extractor will not work correctly down to the diffusion level.

    So , you may not see any errors if you short any signals to diffusion.

    It is probably O.K for the higher levels.

    But, of course, you will need a LVS/DRC checker to fully verify your design at some point.

     

    Colin

Community Guidelines

The Cadence Design Communities support Cadence users and technologists interacting to exchange ideas, news, technical information, and best practices to solve problems and get the most from Cadence technology. The community is open to everyone, and to provide the most value, we require participants to follow our Community Guidelines that facilitate a quality exchange of ideas and information. By accessing, contributing, using or downloading any materials from the site, you agree to be bound by the full Community Guidelines.