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How to define vias for autorouting in VCAR IC6.1.4

dama

Hi all,

 I would like to change via's cut_overhang in VCAR for autorouting.

How can I change or re-define this property? 

Thanks,

James

  • James,

     Can you please provide some additional details on what your trying to accomplish specific to the via cut overhang (e.g. Are they asymmetric?) and what you have already tried in VCAR to define the overhang? This will help in determining what solutions to suggest.

  • Craigth

    Thanks for your replying.

    The vias defined in the tehcfile are asymmetric like rectangle shape(overhang 0.04 on both, 0 on the other).

    I want to use a via having 0.03 overhang xy directions like square shape for detail routing. in order to that, I tried to play with Define/Forget via properties menu, which does not work.

    curretly the only way I can find is to add those vias in the techfile and select those vias that I would like to use for autorouting, however ,the final goal is to assign/define the via properties I want to get without changing the techfile.

    Thanks

    James

  • Hi,

     I'm using the below constraint in the vcar rules file  before exporting. The VCAR is placing single via while routing

        list( '("tsmc18rf" "M2_M1" "symbolic") t)

    But I dont know the rule to keep double contact/via in the router .Please help me.

     

    Thanks,

    Siva

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