Soldermask on via holes in case of chemical nickel gold. The pros to primary lpi solder mask tenting vias is it is. Osh park !sucks, my design sucks! page 1. Patent ep0360579a1 uv curable compositions for making. Pcb test board bluetooth pcb design layout ourpcb. Egan technology reliability and physics of failure. Pcb basics learnsparkfuncom. Solder mask expansion from hole online documentation for. Via tenting, via opening, via plugging headpcb.