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get the overlap area of adjacent metals in single hierarchy

naresh9005

Hi 

we are trying to find the overlapping area of adjacent metals(i.e metal1 to metal2, and metal2 to metal3 and so on ) in a single hierarchy.

we are using "dbLayerStraddl()"  function but it is creating a new shape over the first input layer list. but we required the only common area between the two layers.

please help with this problem .

procedure(metalOverlap()
prog( ()
cv=geGetEditCellView()

layer1=list()
layer2=list()

foreach(a cv~>shapes
when(a~>layerName == "MET2"
layer1=cons(a layer1)
)
when(a~>layerName == "MET3"
layer2=cons(a layer2)
)
)
ov=dbLayerStraddl(cv "POLY" layer1 layer2)
)
)
hiSetBindKey("Layout" "ShiftCtrl<Key>q" "metalOverlap()")

Parents
  • RK56

    Hi,

    You can try with Advanced Boolean engine functions which have far better outcome. You can control which hierarchy layer you need to process. Check abeLayerFromCellView()

    -Ramakrishnan

  • naresh9005
    in reply to RK56

    Thank you for your replay, 

    our layout cell view has only one hierarchy, but we want to get the overlapping area with coordinates, could you help me with more details?

  • RK56
    in reply to naresh9005

    Hi,

    Try this to implement using ABE. I copied this script from cadence documentation and modified

    abeInit( geGetEditCellView() )

    M1 = abeLayerFromCellView( "Metal1" ?startLevel 0 ?stopLevel 1 )

    M2 = abeLayerFromCellView( "Metal2" ?purpose "drawing" ?startLevel 0 ?stopLevel 1)

    overlapLayer = abeNewLayer()

    abeLayerAnd( M1 M2 overlapLayer)

    abeLayerToCellView( overlapLayer "marker" ?purpose "error" )

    abeDone()

    You can iterate over the overlapLayer and get all shapes coordinates. Modify the layer names as per your need.

    -Ramakrishnan

  • Saravanan PK
    in reply to RK56

    Hi Ramakrishnan,

    what will be the case if I want to find the overlap of the same metals? above code works fine, if both metals are different.

    Thanks,

    Saravanan.

  • Andrew Beckett
    in reply to Saravanan PK

    There's no capability to do a self-and operation with the abeLayer functions - there's some discussion of this in an internal change request (CCR 1522996) but that was just a question to R&D, not an enhancement.

    Normally you'd use a physical verification tool to do this - they typically offer a means of doing a self-and on unmerged layers. Diva and Assura support this via a single layer input to geomAnd, and PVS supports it by providing the same (unmerged) input data as both inputs to the and command in the PVS rule language. Other physical verification tools are available ;-)

    So I'd say the answer is to write a short physical verification rule deck to generate the data you need.

    Andrew.

Reply
  • Andrew Beckett
    in reply to Saravanan PK

    There's no capability to do a self-and operation with the abeLayer functions - there's some discussion of this in an internal change request (CCR 1522996) but that was just a question to R&D, not an enhancement.

    Normally you'd use a physical verification tool to do this - they typically offer a means of doing a self-and on unmerged layers. Diva and Assura support this via a single layer input to geomAnd, and PVS supports it by providing the same (unmerged) input data as both inputs to the and command in the PVS rule language. Other physical verification tools are available ;-)

    So I'd say the answer is to write a short physical verification rule deck to generate the data you need.

    Andrew.

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