The origin and development of printed circuit boards

The origin and development of printed circuit boards

Before the advent of printed circuit boards, the interconnection between electronic components relied on the direct connection of wires to form a complete circuit. In modern times, circuit boards exist only as effective experimental tools, and printed circuit boards have become an absolute dominant position in the electronics industry.

At the beginning of the 20th century, in order to simplify the production of electronic equipment, reduce the wiring between electronic parts, and reduce production costs, people began to delve into the method of replacing wiring with printing. Over the past three decades, engineers have repeatedly proposed to use metal conductors for wiring on insulated substrates. The most successful was in 1925, Charles Ducas of the United States printed circuit patterns on an insulating substrate, and then successfully established conductors for wiring by electroplating.

Until 1936, the Austrian Paul Eisler (Paul Eisler) published the foil film technology in the United Kingdom, he used a printed circuit board in a radio device; and in Japan, Miyamoto Yoshinosuke used the spray-attached wiring method "metarikon method" Blowing wiring method (Patent No. 119384)" successfully applied for a patent. 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 metal; while Charles Ducas and Miyamoto Kinosuke’s method is to add only the required components. The line is called the additive method. Even so, because the electronic components at that time generated a lot of heat, the substrates of the two were difficult to use together, so there was no formal practical use, but it also made the printed circuit technology further.

The development of circuit boards:

In the past ten years, my country's Printed Circuit Board (PCB) manufacturing industry has developed rapidly, and its total output value and total output have both ranked first in the world. Due to the rapid development of electronic products, price wars have changed the structure of the supply chain. China has both industrial distribution, cost and market advantages, and has become the world's most important printed circuit board production base.

printed circuit boards have developed from single-layer to double-sided circuit boards, PCB multilayer circuit boards and flexible boards, and continue to develop in the direction of high precision, high density and high reliability. Continuously shrinking volume, reducing costs, and improving performance have enabled printed circuit boards to maintain strong vitality in the development of future electronic products.

The future development trend of printed circuit board manufacturing technology is to develop towards high density, high precision, fine aperture, fine wire, small pitch, high reliability, multilayer, high-speed transmission, light weight and thinness in performance.