What are the via filling options? Cu filled? Soler mask plugging, and it’s clearance? June 23, 2020 By Wellerpcb Team 866 views We can do via fillings as: solder mask plugging; resin plugging, copper filling to via holes (Cu filled), Cearance is 8mil. Likes (0) CONTACT US NOW Attachment: ( a .zip or .rar file, max 25MB ) We’ll do our best to get back to you ASAP. Please enable JavaScript for this form to work.