Via Naming Convention

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   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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bnoel Members Profile Send Private Message Find Members Posts Add to Buddy List Active User Joined: 14 Mar 2014 Location: Western NY Status: Offline Points: 14	Post Options Post Reply Quote bnoel Report Post Thanks(0) Quote Reply Topic: Via Naming Convention 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.



Tom H Members Profile Send Private Message Find Members Posts Add to Buddy List Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Online Points: 5718	Post Options Post Reply Quote Tom H Report Post Thanks(0) Quote Reply 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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