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Restrict innovus tool in placing VIABAR

manpmanp

Hi

I am going through the digital flow using the innovus digital implementation flow.

may anyone help me how to restrict the tool not to put VIABAR in its routing stages?

BR

MANP

  • Can you explain more what you mean by VIABAR? Do you mean rectangular vias, or a layer called VIABAR? 

  • in reply to Kari

    Hi Kari

    Thanks for your reply. I am not sure exactly in what situation it is called VIABAR. Anyways, after finishing the PnR flow in Innovus, I import the the .gdsII and netlist file to virtuoso for checking the LVS and DRC.

    I think for 'single-cut vias' (a large big via), the DRC gives an error of VIABAR and I have to replace that VIABAR with two or more distanced smaller vias.

    In fact, I want to limit the Innovus tool in inserting those big troublesome vias.

  • in reply to manpmanp

    Sounds like you have a situation where there is wider metal that requires a double-cut (or more) via instead of a single-cut. There are usually rules in the LEF file that say what metal widths need double-cut vias, as well as defined double-cut vias for the router to use. Make sure you have these things in your tech LEF.

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