Welding PCBS Welding PCBS - PCBs for Welding Machine - Cheersonic A printed circuit board is an electrical circuit whose components and conductors are contained within a mechanical structure. Conductive features include copper traces, pads, heat sinks, or conductive planes. The mechanical structure is made with insulating material laminated between layers of conductive material. The overall structure is plated and covered with nonconductive solder mask and silk screen to legend [...]