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If the via is partly placed on both planes, then there will be a manufacturing fault.Because both planes will be connected to each other.
If you mean, the via is partly placed on only one plane without touching the other plane,
then there will be no fault.
Do you mean the via pads on internal layers that don't connect?
If so I remove them - in fact Altium removes un-used pads from internal layer automatically.
If the vias in the inner layers that don't reach out to both of the outer layers,
they could be 'buried vias' or 'blind vias'.
A through hole via, normally goes through all layers.
I am an engineer and I am on this about 12 years, i think I can give some suggestions to you.
But can I take a picture of the board with that problem?
Appreciate your sharing.Please keep up your updates.
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