Printed circuit board, also known as printed circuit board, is an important electronic component commonly abbreviated as PCB (Printed Circuit Board). It is the support for electronic components and the provider of circuit connections for electronic components. Due to its use of electronic printing technology, it is called a "printed" circuit board. Before the emergence of printed circuit boards, the interconnection between electronic components relied on direct connection of wires to form a complete circuit. Now, circuit Breadboard only exists as an effective experimental tool, while printed circuit board has become the absolute dominant position in the electronic industry. At the beginning of the 20th century, in order to simplify the production of electronic machines, reduce wiring between electronic parts, and reduce production costs, people began to study the method of replacing wiring with printing. Over the past thirty years, engineers have continuously proposed the use of metal conductors as wiring on insulated substrates. And the most successful was in 1925, Charles Ducas of the United States printed circuit patterns on insulated substrates, and then successfully established conductors for wiring through electroplating.

Until 1936, Paul Eisler, a Austrians, published foil technology in Britain. He used printed circuit boards in a radio device; In Japan, Yoshisuke Miyamoto successfully applied for a patent by using the spray wiring method, . Among the two, Paul Eisler's method is the most similar to today's printed circuit boards. This type of method is called subtraction, which removes unnecessary metals; The approach of Charles Ducas and Hayatsuke Miyamoto is to only add the required wiring, known as the additive method. However, due to the high heat generated by electronic components at that time, the substrates of the two were difficult to match, resulting in no formal practical use. However, this further advanced printed circuit technology.