The one problem with electrical testing is that if there is any connection it
will not be observed as an open.  After the assembly goes through the heats
of assembly processes the vias can open - such as cracking - which are is not
present as received, a result of either thin copper, or poor copper, or even
too great of a z-axis expansion,  So electrical tests can find opens - but
they would have to be such as a circumferential plating void.

Susan Mansilla
Robisan Lab

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