PCBA
Soldermask requirements for high CTI boards
Understanding Soldermask and CTI Soldermask, also known as solder resist, is a thin layer of polymer applied to the copper traces of a printed circuit board (PCB). Its primary purpose is to protect the copper from oxidation and prevent Solder Bridges from forming between closely spaced pads during the soldering process. In addition to these functions, soldermask also provides electrical insulation, improves the board’s appearance, and enhances its durability. Comparative Tracking Index (CTI) is a Read more…