Re: Feedthough/via that straddles (i.e., is bisected by) the cut edge of a PCB?

Un bel giorno Don Y digitò:

I can't see any way to do this, reliably.  So, imagine a house won't
let it through DRCs, regardless of diameter or weight of foil, etc.
 
Or, is there another (not exhorbitantly pricey) technology for precisely
cutting boards that would keep the structure (at least the part that is
not lost to the cut) mechanically (and thus electrically) intact?
 
Else, I will use another -- more expectantly reliable -- approach

The keyword to look for is "castellated holes". The easier way to do it is
to find a manufacturer that explicitly supports them, and follow their
instructions. For example:

https://www.pcbway.com/pcb_prototype/What_are_Plated_Half_Holes_Castellated_Holes_.html

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