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How BB via stagger works in physical constraint.

Ram1234

Hi Team,

Good Day!...,

I was confused of "how this BB via stagger works in physical constraint" because it has min and max values. Is that value referring to the spacing between the BB vias or something else?

If it is spacing, how will the BB vias be impacted by the spacing constraint?

To better understand the concept, kindly explain in depth with a few examples.

Thanks in advance.....

.

  • aniju
    0

    I think BB via stagger which will give clearance of  center to center bb distance between Two BB vias. The reason behind is to avoid overlap each other vias.

    Here is the cross section which will give you the idea of BB via stagger distances.

  • Ram1234
    0 in reply to aniju

    Thank you for the reply,

    Will this over ride the BB via spacing constraint ....

    then how BB via constraint in spacing will works?.

  • aniju
    0 in reply to Ram1234

    Thanks for your response, BB Via spacing constriant is minimum clearance between BB Via to BB via but BB Staggered vias are two pins or two vias on the same net with single trace which is connecting to particular layer and works with center to center distance with in same net. here are some more information on BB via stagger.

    Staggered vias are two pins or vias on the same net with a single connect line connecting them on a particular layer. The stagger distance is the distance from the connect point of one pin or via (x,y location) to the connect point of another.

    A minimum stagger distance lets you control how close staggered vias can be to each other. Zero is a legal value for Min BBvia Stagger, which allows a pad to be placed on top of the via to which it is connected, as in the following example:

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