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Find a overlap of two layers if that layer present in PCell also

Mahesh gunde 1

Hi all,


I am writing code for two layers overlap.

but got stuck to write full code.

Requirement:

Using layers: "od", "nt_n"

if "od" layer present in pcell and if its overlapping this nt_n which is in shape.


my code:

MARKER_LPP = list("marker" "error")
procedure( ntn_check()
odList   =  setof(i geGetEditCellView()->shapes car(i->lpp)=="od")
ntnList  =  setof(i geGetEditCellView()->shapes car(i->lpp)=="nt_n")
nt_n_var = dbLayerAnd(geGetEditCellView() MARKER_LPP odList ntnList  )
)

This code is checking for only shapes overlap, its ignoring if layers present are in instances.

I want to know if any shapes are overlapping with Pcell layers also.

Kindly help me on this.

Thanks,

Mahesh

Parents

  • Mahesh,

    I agree with Lawrence - maybe this is a cultural thing, but (other than it not being standard outside of Indian English) it did suggest that you were expecting Lawrence (who doesn't work for Cadence, just kindly helping out colleagues from other organisations) to solve your problem for you.

    You might want to look at the "abe" (Advanced Boolean Engine) functions, such as abeLayerAnd. These were added in IC617, but I wouldn't use them if you're using the first few ISRs. Probably ISR8 and later (roughly speaking) should be OK, because the interface to them changed slightly because they were inconsistent with other functions in SKILL. The code below however isn't dependent upon any of these arguments that changed. These can find shapes through the hierarchy (the default behaviour) - for example:

    abeInit(geGetEditCellView())
    od=abeLayerFromCellView("od")
    nt_n=abeLayerFromCellView("nt_n")
    overlaps=abeNewLayer()
    abeLayerAndNot(od nt_n overlaps)
    ; or could use abeLayerToHilightSet - see the manual
    abeLayerToCellView(overlaps MARKER_LPP)

    Note, this code has not been tested - it was just to point you in the (possibly) right direction.

    Regards,

    Andrew.

Reply

  • Mahesh,

    I agree with Lawrence - maybe this is a cultural thing, but (other than it not being standard outside of Indian English) it did suggest that you were expecting Lawrence (who doesn't work for Cadence, just kindly helping out colleagues from other organisations) to solve your problem for you.

    You might want to look at the "abe" (Advanced Boolean Engine) functions, such as abeLayerAnd. These were added in IC617, but I wouldn't use them if you're using the first few ISRs. Probably ISR8 and later (roughly speaking) should be OK, because the interface to them changed slightly because they were inconsistent with other functions in SKILL. The code below however isn't dependent upon any of these arguments that changed. These can find shapes through the hierarchy (the default behaviour) - for example:

    abeInit(geGetEditCellView())
    od=abeLayerFromCellView("od")
    nt_n=abeLayerFromCellView("nt_n")
    overlaps=abeNewLayer()
    abeLayerAndNot(od nt_n overlaps)
    ; or could use abeLayerToHilightSet - see the manual
    abeLayerToCellView(overlaps MARKER_LPP)

    Note, this code has not been tested - it was just to point you in the (possibly) right direction.

    Regards,

    Andrew.

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