pcells with pcParamShapeInfo

Discussion in 'Cadence' started by Guenther Sohler, Sep 17, 2007.

  1. With the construct

    hp=dbReplaceHierProp(pcCellView,"pcParamShapeInfo");
    dbReplaceProp(hp,"shapeType","string","polygon");
    dbReplaceProp(hp,"paramName","string","coords");

    you can create pcells which you can draw like a polygon during
    instanciation.

    How does it get possible to also Chop this instance-polygon after it is
    instanciated ?
    Is it possible at all ?
     
    Guenther Sohler, Sep 17, 2007
    #1
  2. I don't believe this is possible. This was just some limited support that was
    added for the graphical pcell editor (initially) to allow pcells defined by a
    drawn shape.

    There is of course the ability to create multi-part paths (and multi-part
    rectangles), which are level-0 objects, and can be chopped, reshaped, and so on.

    What exactly are you trying to create a pcell to do?

    Regards,

    Andrew.
     
    Andrew Beckett, Sep 17, 2007
    #2
  3. We already have a pcell which you define by rectangle.
    It automatically fills with vias and you can use this do place
    a via in layout defined by SIZE and not by ROWS*COLUMNS, which is much
    more effective.

    In case there is an obstraction at this via, it would now be nice to
    CHOP this rectangle. This rectangle would then get polygon character,
    but the via drawing would not get much more complicated
     
    Guenther Sohler, Sep 17, 2007
    #3
  4. By the way:

    What is the name of the property to tell cadence,
    that it shall complete a polygon Orthogonally and not "ANY Angle" when
    creating a polygon instance ?
     
    Guenther Sohler, Sep 17, 2007
    #4
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