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Can we add the FILLER cells after routing completed

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Dear all,

I am working on Place & Route flow,

1. can any one suggest me when we should add FILLER cells ie after completing routing using nanoroute in cadence or after FIX wire in magma.

2. what are the advantage and disadvantages, if FILLER cells are added before and after routing.

Thanks & Regards,
Prashant


Originally posted in cdnusers.org by kulprashant05
Parents

  • Hello Mastaru !! ,

    One should do FILLER cell addition before GDS strimout ( i.e after fixing DRC by P&R [after routing] )

    Please go through some basics CMOS design rules process to know more about it.

    Have you heard of postmaskECO ??

    for what type of FILLER cell you are talking about ??
    like i) subcon** ii) SPLIT** iii) CLIP** iv) CAP** ??

    Was there any difference in nanoroute and Magma Fix-cell options in your run ??

    Were you able to fix timing issues according to sign-off .


    Originally posted in cdnusers.org by mohanch007
Reply

  • Hello Mastaru !! ,

    One should do FILLER cell addition before GDS strimout ( i.e after fixing DRC by P&R [after routing] )

    Please go through some basics CMOS design rules process to know more about it.

    Have you heard of postmaskECO ??

    for what type of FILLER cell you are talking about ??
    like i) subcon** ii) SPLIT** iii) CLIP** iv) CAP** ??

    Was there any difference in nanoroute and Magma Fix-cell options in your run ??

    Were you able to fix timing issues according to sign-off .


    Originally posted in cdnusers.org by mohanch007
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