Via Naming Convention |
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bnoel
Active User Joined: 14 Mar 2014 Location: Western NY Status: Offline Points: 14 |
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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
Admin Group Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5716 |
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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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