WhoKnewKnows , 05-29-2021, 03:11 PM
Via-in-pad construction typically requires that the vias will either be plated shut, or filled with an epoxy and plated over, then pad surface finish (ENIG, etc.) is applied. There are few times where it's possible to have via in pad and not be concerned with starving the solder joint of solder. But, if doing an entire design as via in pad, you may as well allow all vias to be filled and plated over. Selective via filling will cost more. + Filled and plated over vias looks pretty sleek TBH. Don't forget to turn on tenting
EDIT: Sorry, I just realized you asked Robert. Looking forward to Robert's answer. Perhaps I missed something. Speaking of missing something, I'm surprised your assembly shop and or fab shop didn't recommend filling and plating over vias instead of simply suggesting to avoid via in pad designs.