Before the advent of Printed Circuit Board, interconnections between electronic components were made up of wires that were directly connected to form a complete circuit. In the contemporary era, circuit boards exist only as effective experimental tools, and printed circuit boards have occupied absolute status in the electronic industry.
In the early twentieth century, in order to simplify the manufacture of electronic machines, reduce the wiring between electronic parts and reduce the cost of production, they began to study the ways of replacing the wiring by printing. For thirty years, engineers have proposed to use metal conductors for wiring on insulated substrates. The most successful finished product was in 1925, when the Charles Ducas printed circuit patterns on insulated substrates and successfully built conductors for wiring.