PCBs (Printed Circuit Boards) are fundamental in electronics, composed of multiple layers like silkscreen, soldermask, copper, and substrate, chosen for specific electrical functions.

Most electronic circuits are mounted on PCBs, or Printed Circuit Boards, which provide mechanical support and electrical interconnection of electronic components. There are, however, special applications that involve the use of single and double-sided PCBs, multi-layer PCBs, or even rigid and flexible PCBs with aluminum backing, targeting medical, industrial, auto, and aerospace industries. They may use materials such as fiberglass, epoxy, aluminum, and others.