A printed circuit board or PCB is a board that is used to connect electrical components using copper tracks instead of wires. The holes drilled in the plate are used to secure the electrical components in position. Then they are welded to keep them in position and the copper rails join them in a circuit. The plate and the components together are known as PCB assembly (or printed circuit board assembly).

Nowadays, once the design process has been carried out using CAD (Computer Aided Design) and a plan is formed, PCB manufacturing can be fast, since it is automated through machines and computer technology. . The next part is the process quality and control element.

While many inventors had versions of PCB, it was an Austrian engineer named Paul Eisler, who is credited with the configuration of the printed circuit in 1936. Going into the 1980s, the boards became much smaller and their functionality and costs of production decreased significantly due to the ability to mass produce plates and components.

The fact that the circuit is on a fixed plate provides uniformity to the design and, therefore, it is much easier to find and identify problematic components. This means that they are much faster to repair and maintain. This also means that the chances of making a reconnection error are much lower, since the electronic components are in a right place.