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Via to Shape clearance in specified layer

C Shiva

 Hi all,

     I need to maintain shape to via clearance of selected vias as 20mils and 40mils in specified layers. When i applying properties to these vias, it will affect all layers. How can i maintain the clearance in only few layers without affecting other layers? Attached an image for referance.

Thanks,

Shiva.

  • oldmouldy

    You could create a Spacing Constraint Set, you can specify Thru Via clearance by layer and attach this to a net, or net class. This might meet your needs. As you found, the Via Property overrides are for "all" layers.

  • Khurana

    Can you not specify Shape level Via to Shape clearance by selecting the shape > right click > Parameters > Clearances...?

  • redwire
    You can also create a specific via that has the extra clearance and replace the ones you need to with the specific via.
  • C Shiva

     Thanks to all. Actually as per our customer requirment, i need to maintain clearance between only few nets. GND, GND_EARTH, GND_MAIN. Other nets should not be affected. I have set spacing constraints. But it will affect all the nets.

    As per Redwire, creation of specific via is a solution, but antipad will work only in negative shapes and it will take much effort. All selected via's need to be specified one by one.

  • daacid

    Hi Shiva,

         Use the Constraint Manager to create a Spacing CSet, set the spacing parameters you need, then change the nets you need to that Referenced Spacing CSet.  That will give you the spacing you a need for your "GND" nets and not effect the rest of your design.

    Don

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