Because it is made of electronic printing technology, it is called a "printing" circuit board.

　　Before the emergence of the printed circuit board, the interconnection between electronic components rely on the wires to directly connect to form a complete line. Circuit bread boards exist only as effective experimental tools, and the printing circuit board has become an absolute dominance in the electronics industry.

　　At the beginning of the 20th century, in order to simplify the production of electronic machines, reduce the wiring between electronic parts, and reduce the advantages of production costs, they began to study the method of replacing the wiring by printing. In the past thirty years, engineers have continued to propose a metal conductor on the insulating substrate as a wiring. The most successful is that in 1925, Charles Ducas in the United States printed out line patterns on the insulated substrate, and successfully established a conductor to wiring in an electroplating. [1]

　　Until 1936, the Austrian Paul Eisler published a foil film technology in the UK [1], and he used a printing circuit board in a radio device; The "コ リ コ ン 吹 吹 吹 法 法 法 (Folk 119384)" successfully applied for a patent. [2] The Paul Eisler's method is the most similar to today's printing circuit boards. This method is called subtraction method, which is to remove unnecessary metals. The required wiring is called the bonus method. Despite this, because of the large heat of the electronic parts at that time, the substrates of the two were difficult to use [1], so that there was no formal practical work, but it also made the printing circuit technology further.

　　In 1941, the United States wrapped the copper paste on talc to make a near -connection.

　　In 1943, Americans used the technology in a military radio.

　　In 1947, epoxy resin began to be used as a manufacturing substrate. At the same time, NBS began to study manufacturing technologies such as printing circuit technology formed coils, capacitors, resistors and other manufacturing technologies.

　　In 1948, the United States officially recognized this invention for commercial purposes.