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Vias Under ESP32-P4

Posted: Fri Jan 23, 2026 10:48 am
by Apostal2008
Good afternoon,

The ESP32-P4-FUNCTION-EV-BOARD features vias located directly under the microcontroller.
I implemented a similar design, but I occasionally encounter issues where solder wicks into these vias from the central ground planes, causing signal lines to short to ground.
p4 vias.jpg
p4 vias.jpg (159.56 KiB) Viewed 500 times
How is this issue avoided during the production of the official dev board?

Re: Vias Under ESP32-P4

Posted: Sat Jan 24, 2026 12:21 am
by Sprite
It looks like the official devkit has solder mask over the edges of the ground plane (notice the fact that they're lighter colored than the center bit). If that's enough, I can also imagine it might use tented vias.