PTH process October 15, 2020 By Wellerpcb Team 1058 views PTH also called Plated Through Hole: the purpose of this process is to plate thin copper (normal thickness is 0.3-0.5um) to the wall of the through holes by A complex chemical process to get the basic electrical connection to the layers. Likes (1) 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.