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Auto contact SKILL function

Yaosan

Can someone please point me to the SKILL function used to invoke the auto contact feature (i.e. create via -> auto) in Virtuoso? I would like to use this function to automatically insert vias instead of doing it by manually clicking where I want the auto via to appear.

If there is no such public SKILL function available (any idea why?), can someone please suggest how should I go about coding such a function myself. I'm thinking of using dbLayerAnd, dbGetOverlap etc. to find the intersection area, but I'm not sure if I can traverse the hierarchy and get the shapes and net underneath the intersection area.

Any feedback will be greatly appreciated! Thanks!
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  •  Hi Yaosan,

    First, I will assume that you are talking about version IC61x, since the menu you described was "Create Via" and not Create Contact. In IC61 (based on the Open Access database), vias are objects as opposed to instances (as they were in IC5141 and earlier), so you would use the dbCreateVia() SKILL function to create the via.  Yes, you would probably want to use the dbGetOverlaps() function to find the appropriate overlapping connectivity layers, perhaps in conjunction with the techFindViaSpec() function to find the via definitions that could be used.  I'm not sure if there are any solutions, but you might search for leCreateContact() and the dbCreateVia() functions as starting points.

    I hope that this helps you.

    Regards,

    Lawrence.

Reply

  •  Hi Yaosan,

    First, I will assume that you are talking about version IC61x, since the menu you described was "Create Via" and not Create Contact. In IC61 (based on the Open Access database), vias are objects as opposed to instances (as they were in IC5141 and earlier), so you would use the dbCreateVia() SKILL function to create the via.  Yes, you would probably want to use the dbGetOverlaps() function to find the appropriate overlapping connectivity layers, perhaps in conjunction with the techFindViaSpec() function to find the via definitions that could be used.  I'm not sure if there are any solutions, but you might search for leCreateContact() and the dbCreateVia() functions as starting points.

    I hope that this helps you.

    Regards,

    Lawrence.

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