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issue with adding Mfill

KVBABU

Hi

Iam  working on design with TSMC 28nm technology, in which i tried to add Metal fill . Even with default settings in encounter GUI , i could not able to add Mfill, diplaying below error and warning  messages:
addMetalFill -layer { M1 M2 M3 M4 M5 M6 } -nets { vss vdd } -timingAware off
**ERROR: (ENCMF-192):   Spacing table is too big (width:440 length:440)
End metal filling: cpu:  0:00:00.0,  real:  0:00:00.0,  peak mem:  651.17  megs.
**WARN: (ENCMF-9):      5 memory pool(s) not released!

*** 5 memory pool(s) in use ***

 I could not able guess , from where the tool is picking up the spacing table  (width:440 length:440).
Kindly help me to resolve this issue.

Thanks & Regards,
K.VISWANADH BABU

  •  Before doing addMetalFill, you have to use setMetalFill to set up all of your widths, spacings, etc. Check the docs for setMetalFill and give that a try.

  • Hi Kari,

     

    Thanks for your immediate reply. As per documents, i have enough info. conatined in my tech lef. The only parameter missing which i was observed is LEF58_FILLTOFILLSPACING. As an experiment , i defined this value w.r.t. values in verication rule files.But, i could not able to suceessed.

      

    Regards,

    K.VISWANADH BABU 

  •  I have never seen the tech LEF contain enough info. I strongly recommend you use setMetalFill for everything. Make sure you get the data from your design rule manual - the numbers in the tech lef may not be right.

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