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 QRC's av_extracted view is not showing any metal layers 

Last post Wed, Mar 13 2013 2:09 AM by berndfi. 5 replies.
Started by pavan7kumar 12 Mar 2013 12:30 AM. Topic has 5 replies and 1222 views
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  • Tue, Mar 12 2013 12:30 AM

    QRC's av_extracted view is not showing any metal layers Reply

     Hello all,
                 I designed simple inverter using UMC65ll kit and it passed successfully in DRC, LVS, and QRC. But extracted view of this design isn't showing any metal layer instead schematic of transistor is shown (figure attached). I have also ran QRC by setting valid layers (LSW->edit->set valid layers->set all valid) but problem still remains the same. Moreover, I am only using METAL1, DIFFUSION and POLY1 layers. Versions are as follows.

    IC 614-06.14-512
    Assura 4.1 USR2 with EXT101 &
    MMSIM 0720.593
    How can I set up this to show layers in av_extracted view?



    Regards,

    Pavan.


    • Post Points: 20
  • Tue, Mar 12 2013 1:23 AM

    • berndfi
    • Top 100 Contributor
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    • Neubiberg, Bavaria
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    Re: QRC's av_extracted view is not showing any metal layers Reply

     To see metal shapes in the extracted view is not necessarily required
    for the function of the extracted view, storing devices, parameters, connectivity
    and parasitics.
    But the most likely reason if they do not appear is the missing "saveInterconnect"
    statement in your "extract.rul" file.

    • Post Points: 20
  • Tue, Mar 12 2013 4:10 AM

    Re: QRC's av_extracted view is not showing any metal layers Reply

    Thanks for your quick reply Berndfi. Ya view may not be required but once if we have an av_extract view then it becomes easy to trace out parasitics among layers for finding which layer is giving what value of prasitics. 

    I have included "saveInterconnect" in "extract.rul" file but still it's not showing any layers in av_extracted view. I have also attached my QRC log file here. Any other problem with this? 

    Regards,

    Pavan.

     

    • Post Points: 20
  • Tue, Mar 12 2013 6:56 AM

    • berndfi
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    • Neubiberg, Bavaria
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    Re: QRC's av_extracted view is not showing any metal layers Reply

    In the "Create _save_layers" section of your log file there should be something like 

    "Copying Layer" or " Save recognition", which I can't see.

    You got a bunch of warnings for "No library model" which I'm not sure where they are

    related to, your "linbInti.il" or Assura?

    Maybe you can try with "saveReconition" in the "extract.rul" file.

    But my impression is that something goes wrong before it comes to writng the layers to the

    extracted view. 

     

    • Post Points: 20
  • Tue, Mar 12 2013 8:33 AM

    Re: QRC's av_extracted view is not showing any metal layers Reply

     I tried with "saveRecognition"but it doesnt work berndfi. In extract.rul I could only find "saveProperty" (in UMC65). But in GPDK180nm, I found lines such as

    saveInterconnect((M6term "Metal6"))
    saveInterconnect((M5term "Metal5"))
    saveInterconnect((M4term "Metal4"))
    saveInterconnect((M3term "Metal3"))
    saveInterconnect((M2term "Metal2"))
    saveInterconnect((M1term "Metal1"))
    saveInterconnect((NSDterm "Nimp"))
    saveInterconnect((PSDterm "Pimp"))
    saveInterconnect((NWELLterm "Nwell"))
    saveInterconnect((CapMetal "CapMetal"))
    saveInterconnect((INDterm1 "INDdummy"))
    saveInterconnect((INDterm2 "INDdummy"))
    saveInterconnect((POLYterm "Poly"))
    saveInterconnect((JVARanode "JVAR1dummy"))
    saveInterconnect((Pwell "Pwell"))
    saveInterconnect((ISOPWELL "Nburied"))
    saveInterconnect((Nburied "Nburied"))

    But i am not understanding how they mentioned layers and what it means to. 

    From library I have only used only tt_ll_rvt and it is not showing any warning about this. So i think this is not an issue.

     

     

    Regards,

    Pavan.

     

     

    • Post Points: 20
  • Wed, Mar 13 2013 2:09 AM

    • berndfi
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    Re: QRC's av_extracted view is not showing any metal layers Reply

     >>But i am not understanding how they mentioned layers and what it means to. 

    Have you ever had a lookk into the documentation and tried to figure out how to apply

    "saveInterconnect" or "saveRecognition" correct to your command rules.

    • Post Points: 5
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Started by pavan7kumar at 12 Mar 2013 12:30 AM. Topic has 5 replies.