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Query on necessity of Filler Cells in a small custom design - Virtuoso

Shameel

 Hi ,

I am doing a custom design in virtuoso (Digital) in which I am connecting all Nwell & Pwell manually to VDD and GND . Then do I really need filler cells before a tapeout?

Thanks

  •  No. Filler cells are typically there for several reasons - one to connect up the power/ground rails; two to ensure the wells continue; three to ensure density. Provided the circuit is connected up OK still and is DRC correct, there's no reason why they have to be used.

    Regards,

    Andrew.

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