connectivity problem

Discussion in 'Cadence' started by layoutDesign, Jan 31, 2009.

  1. layoutDesign

    layoutDesign Guest

    There exists a layout with no schematic connectivity. There are labels
    at the top of the hierarchy over the pads. At various levels of the
    hierarchy, there are metals and vias. I want to find out what label a
    particular via shape is connected to.

    I am unfamiliar with Assura rule decks, but this seems like the best
    solution for such a connectivity problem that doesn't have a
    schematic. Should I look at Assura, or just create a SKILL script that
    could somehow address this? Any hints or help is appreciated.
     
    layoutDesign, Jan 31, 2009
    #1
  2. layoutDesign

    Marc Heise Guest

    If you want to keep it simple use the "Mark Net" command.
    It needs a valid "extractLayers" section in the Techfile and
    will crawl through your hierarchy marking connected nets
    after you click on one shape.
    Don't forget to deselect your Metal1-Diffusion vias, or it
    will mark through the gates of your transistors. ;)

    Regards,
    Marc
     
    Marc Heise, Feb 1, 2009
    #2
  3. layoutDesign

    PM Guest

    Well said Marc(k) ;)
     
    PM, Feb 2, 2009
    #3
  4. layoutDesign

    Jean-Marc Bourguet Guest

    In the CIW menu "Tools" there is an entry "Conversion Toolbox". There
    there is a connectivity extraction tool which could be what you are looking
    for.

    Yours,
     
    Jean-Marc Bourguet, Feb 2, 2009
    #4
  5. layoutDesign

    layoutDesign Guest

    Basically, I am wanting to create a script(s) of some sort that will
    get/generate this information and then output a text file with NAME,
    XY COORD, VIA_TYPE.
     
    layoutDesign, Feb 2, 2009
    #5
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