Nowadays, printed circuits are used in communication products, computers and almost all other electronic products. The development and perfection of printed circuit technology have created conditions for the invention of integrated circuit, which changes the appearance of the world. With the development of science and technology, printed circuit board is widely used in military industry, communication, medical, electric power, automobile, industrial control, smart phone, wearable and other high-tech fields.
The invention of the printed circuit
Printed circuits were invented in the mid-1930s by Austrian electrical engineer Bao·Eisler. Eisler studied electrical engineering at the Vienna school of engineering and, after graduating in 1930, studied printing technology. When he was researching circuit boards, he often went to the library to consult books on printing technology. Sprouting after careful thinking, he thought: if like printed books or newspapers, the circuit of electronic device a printing on the circuit board, there is no need to use hand piece to make circuit boards, circuit also need not one by one to welding, can greatly improve the production efficiency and reliability of electronic products. In the printing industry, photoengraving is usually used to produce pictures on paper. That is, by taking photographs, the picture of the bottom plate, etched on the copper or zinc plate, with this kind of copper or zinc plate, can print a lot of pictures
Eisler tried to make circuit boards in a similar way to printing. He drew a diagram of an electronic circuit, and etched it on an insulating board covered with copper foil. In this way, the electronic components are connected to each other through a circuit formed by the copper foil on this plate. This printing line can not only improve the reliability of electronic products, but also greatly improve the production efficiency, which has great value and potential for the development of new electronic products. The adoption of printing circuit technology makes the mass production of electronic equipment simple and easy, and lays a foundation for the mechanization and automation production of electronic products. Since the 1950s, the great progress of various electronic products, including communication equipment, is closely related to the use of printed circuit technology.With the continuous improvement of the printed circuit manufacturing level, the printed circuit produced can achieve high precision, thus pushing the production and manufacturing of the circuit board to a new stage. In the printing industry, a large image can be reduced to a certain size by shooting.
In the manufacture of printed circuits, it is also possible to reduce the electronic circuit diagram to a small area, complex and reliable electronic circuit board. This printed circuit board is very suitable for communication equipment and computers with complex circuits and high reliability requirements. The development of printed circuit technology laid the necessary technical foundation for the subsequent invention of integrated circuit.Circuit board has a history of more than 60 years since its invention. History shows: no circuit boards, no electronic circuits, flight, transportation, atomic energy, computers, aerospace, communications, home appliances... None of this will happen.
Chip, IC, integrated circuit is the food of electronic information industry, semiconductor technology reflects the level of industrial modernization of a country, guide the development of electronic information industry. And semiconductor (integrated circuit, IC) electrical interconnection and assembly must rely on circuit board.