pcb design - Solder blobs on PCB traces and vias - Electrical Engineering Stack Exchange
PCB: choose the type of VIA FILLING according to your needs - ALBA PCB Group
A left hand holding a soldering iron and soldering a through hole component on its track on a green printed circuit board, on black background Stock Photo - Alamy
Via Holes Covered with Soldermask with ENIG Finish - Eurocircuits
How and where use vias in PCB design
Electronics Blog: PCB vias solder mask tenting
What is a via hole in a PCB? - Technical Terms by Eurocircuits