During what process is the Solder Mask blistering? Wave solder, Reflow? What temperatures are the boards seeing? Is the LPI properly cured? ---------- From: TechNet-request To: TechNet Subject: Soldermask Date: Friday, June 21, 1996 14:24 We are having problems with LPI soldermask when plugging via holes. On many occasions we get blistering of the LPI mask on and around the vias. Any help in resolving this problem would be appreciated.