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Change the number of vias

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Hello,
In my design Nanoroute creates 2 vias for a specific net, but the DRC in calibre says that 4 vias are required. How can I change the number of vias for a net?

Christian


Originally posted in cdnusers.org by lets

  • Hi Cristian ,
    I have the similar DRC ERROR issued in my design too, I my anticipation the cause is due to LEF rule description .
    Soce cant understand the internal structure of a mega cell ( such as RAMs ) for via rule.
    So based on the technology rule description if 4 vias are required do either of the following things for work around .
    after importing the violation (.err) file on to Soce ( load violation type calibre ).
    1. do manual route ( by edit route GUI option ) .
    after deleting the existing one ,
    NOTE : U need to do L type jogging to drop 4 vias .

    2. change the metal layer . depending on available resources .
    BTW : you have not mentioned on which via. the violation happened .

    If you could not solve please send the pattern ...

    Good luck .

    Best regards,
    Mohan Ch[b] [/b]


    Originally posted in cdnusers.org by mohanch007

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