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Get PRBoundary coordinates for a PCELL instance

mihirDesai

HI,

Sorry if this question is asked before.

I am trying to find the coordinates of PRBoundary for a PCELL instance.

Any one knows how to get this ?

If I try inst->master->bBox it gives the coordinates of the pcell evaluated with default parameters.

But I want coordinates of the pcell evaluated with modified parameters.

Thanks,

Mihir

Parents

  • Hi Mihir,

    In case of a pcell instance inst~>master points to the instance's submaster which reflects the actual parameters of that instance and not the default parameters. Just place two instances of one and the same pcell but with different parameters (parameters that actually affect the pcells geometry) and then you should get different bounding boxes for both instances.

    Max

  • in reply to mbracht

    Hi Mihir,

    In addition to what Max says, what  you'd be looking at with inst~>master~>bBox is not the prBoundary but the overall bounding box of the subMaster - which includes any shapes that protrude beyond the prBoundary (assuming there is actually a prBoundary object within the PCell). If you wanted just the prBoundary (if there is one), then it would be:

    inst~>master~>prBoundary~>bBox

    By the way, if you really wanted to get the PCell evaluated with the default parameters, then it would (usually) be: inst~>master~>superMaster~>bBox or inst~>master~>superMaster~>prBoundary~>bBox .

    Regards,

    Andrew.

Reply
  • in reply to mbracht

    Hi Mihir,

    In addition to what Max says, what  you'd be looking at with inst~>master~>bBox is not the prBoundary but the overall bounding box of the subMaster - which includes any shapes that protrude beyond the prBoundary (assuming there is actually a prBoundary object within the PCell). If you wanted just the prBoundary (if there is one), then it would be:

    inst~>master~>prBoundary~>bBox

    By the way, if you really wanted to get the PCell evaluated with the default parameters, then it would (usually) be: inst~>master~>superMaster~>bBox or inst~>master~>superMaster~>prBoundary~>bBox .

    Regards,

    Andrew.

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