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how to custom abutted devices' poly to contact distance

DavidLou
Hello experts,
I have quite a lot abutted devices in a long row.  I'd like to expand the poly to contact distance so that they can pitch-match with other rows.
I have an example snapshot here to illustrate with larger scale than the expansion I'm looking for. the first row is where I wish I can expand the Poly and Contact spacing so that in the end the all the devices in both rows are aligned, without actually make the devices in first row bigger/wider. I want them still be abutted to avoid edge effect.
is there someway I can control such spacing when abutting devices?
IC6.1.7-64b.500.21
thanks a lot,
David
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  • Andrew Beckett

    Hi David,

    Whether you can do this depends on whether the devices have a parameter to control increasing the poly to contact spacing, and whether they honour that during abutment. That's a function of whatever PDK you're using, not a general capability. In essence, the abutment capability is pretty technology agnostic; it's up to the PDK and the devices themselves as to precisely what happens when an abutment event occurs (i.e. when pin figures which have abutment properties on them are overlapped).

    Regards,

    Andrew.

  • DavidLou
    in reply to Andrew Beckett

    thanks Andrew, fine, I take that as no then. there are not many cdf parameters we can play with from the cells....

  • Andrew Beckett
    in reply to DavidLou

    It might be yes, it might be no - I can't say. It's not something that is under Virtuoso's control, but a function of the however the PDK has been implemented.

    Sometimes there are hidden parameters which control this kind of thing in some PDKs - you might be wise to ask the foundry.

    Regards,

    Andrew

Reply
  • Andrew Beckett
    in reply to DavidLou

    It might be yes, it might be no - I can't say. It's not something that is under Virtuoso's control, but a function of the however the PDK has been implemented.

    Sometimes there are hidden parameters which control this kind of thing in some PDKs - you might be wise to ask the foundry.

    Regards,

    Andrew

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