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Via Naming Convention

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bnoel View Drop Down
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    Posted: 13 Dec 2016 at 2:05pm
Isn't it time to drop the zz from the following via naming conventinon:  via-xx-yy-zz  where xx is the pad diameter, yy is the hole diameter and zz is the anti-pad diameter?  We haven't been using negative planes in years and I believe most EDA tools have gotten away from them too.  Thoughts.
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Tom H View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 13 Dec 2016 at 2:40pm
Where is a via naming convention at?

The anti-pad is for both Positive and Negative planes and it represents a very important value in the pad stack, especially for vias.

If the anti-pad diameter should not be larger than the pad annular ring + trace space.

You do not want to run high speed signal traces over a plane anti-pad. The plane is the signal return path and trace couples with the plane.

In the via pad stack, you have to define the pad, hole, anti-pad and direct plane connect (flood over) for a normal copper pour plane flood.

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