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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
  • Kevin Earls

    I will give you some ideas with the following. It doesn't handle metal in vias or other non-metal shapes.

    ;get met1 shapes
    met1list = list() (foreach shape (setof s dbGetOverlaps(cellView cellView~>bBox) car(s~>lpp)=="METAL1") met1list = cons(shape met1list))

    ;get met2 shapes
    met2list = list() (foreach shape (setof s dbGetOverlaps(cellView cellView~>bBox) car(s~>lpp)=="METAL2") met2list = cons(shape met2list))
     
    ;create scratchcell for dbLayerAnd - you can use the existing cellView if it is editable but you
    ; have to keep track of the created shapes and remove them. Using a scratchcell is easier.
    scratchcell = dbOpenCellViewByType(cellLib cellName "layout_scratch" "maskLayout" "s")

    ; find overlaps and create a TEXT layer for each overlap
    newlayers = dbLayerAnd(scratchcell list("TEXT" "drawing") met1list met2list)
    (foreach shape newlayers
        (printf "%L\n" shape~>bBox)
    )   

    ;delete scratch cell
    ddDeleteObj(ddGetObj(scratchcell~>libName scratchcell~>cellName scratchcell~>viewName))

Reply
  • Kevin Earls

    I will give you some ideas with the following. It doesn't handle metal in vias or other non-metal shapes.

    ;get met1 shapes
    met1list = list() (foreach shape (setof s dbGetOverlaps(cellView cellView~>bBox) car(s~>lpp)=="METAL1") met1list = cons(shape met1list))

    ;get met2 shapes
    met2list = list() (foreach shape (setof s dbGetOverlaps(cellView cellView~>bBox) car(s~>lpp)=="METAL2") met2list = cons(shape met2list))
     
    ;create scratchcell for dbLayerAnd - you can use the existing cellView if it is editable but you
    ; have to keep track of the created shapes and remove them. Using a scratchcell is easier.
    scratchcell = dbOpenCellViewByType(cellLib cellName "layout_scratch" "maskLayout" "s")

    ; find overlaps and create a TEXT layer for each overlap
    newlayers = dbLayerAnd(scratchcell list("TEXT" "drawing") met1list met2list)
    (foreach shape newlayers
        (printf "%L\n" shape~>bBox)
    )   

    ;delete scratch cell
    ddDeleteObj(ddGetObj(scratchcell~>libName scratchcell~>cellName scratchcell~>viewName))

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