PCB development history

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PCB development history [Copy link]

　　PCB (Printed Circuit Board), Chinese name is printed circuit board, also known as printed circuit board, is an important electronic component, the support of electronic components, and the carrier of electrical connection of electronic components. Because it is made by electronic printing, it is called "printed" circuit board.
　　Printed boards have developed from single-layer to double-sided, multi-layer and flexible, and still maintain their own development trends. Due to the continuous development towards high precision, high density and high reliability, the continuous reduction of volume, reduction of cost and improvement of performance, the printed board still maintains a strong vitality in the development of future electronic equipment.
　　The discussion of the development trend of printed board production and manufacturing technology at home and abroad is basically consistent, that is, it develops towards high density, high precision, fine aperture, fine wire, fine spacing, high reliability, multi-layer, high-speed transmission, light weight and thinness. At the same time, it develops towards improving productivity, reducing costs, reducing pollution, and adapting to multi-variety and small batch production in production. The technical development level of printed circuits is generally represented by the line width, aperture, and board thickness/aperture ratio on the printed board.
　　The creator of the printed circuit board is Paul Eisler, an Austrian. In 1936, he first used the printed circuit board in the radio. In 1943, Americans mostly applied the technology to military radios. In 1948, the United States officially recognized this invention for commercial use. Since the mid-1950s, printed circuit boards have been widely used. Before the
　　emergence of PCBs, the interconnection between electronic components was completed by direct connection of wires. Today, wires are only used in laboratories for experimental applications; printed circuit boards have definitely occupied an absolute controlling position in the electronics industry. Since the
　　reform and opening up, China has attracted a large-scale transfer of European and American manufacturing industries due to its preferential policies in labor resources, markets, and investment. A large number of electronic products and manufacturers have set up factories in China, which has driven the development of related industries including PCBs. According to statistics from China CPCA, in 2006, China's actual PCB output reached 130 million square meters, with an output value of US$12.1 billion, accounting for 24.90% of the world's total PCB output value, surpassing Japan to become the world's first. From 2000 to 2006, the average annual growth rate of China's PCB market reached 20%, far exceeding the global average. The global financial crisis in 2008 had a huge impact on the PCB industry, but it did not cause a catastrophic blow to China's PCB industry. Stimulated by national economic policies, China's PCB industry recovered in 2010, and the output value of China's PCB reached 19.971 billion US dollars in 2010. Prismark predicts that China will maintain a compound annual growth rate of 8.10% between 2010 and 2015, higher than the global average growth rate of 5.40%.
　　The reason why PCB can be used more and more widely is that it has many unique advantages, which are summarized as follows.
　　High density. For decades, the high density of printed circuit boards has been developing with the improvement of integrated circuit integration and the advancement of installation technology.
　　High reliability. Through a series of inspections, tests and aging tests, the PCB can be guaranteed to work reliably for a long time (usage period, generally 20 years).
　　Designability. For various PCB performance requirements (electrical, physical, chemical, mechanical, etc.), the printed board design can be realized through design standardization and normalization, which is short in time and high in efficiency.
　　Producibility. With modern management, standardized, scaled (quantified), automated production can be carried out to ensure product quality consistency.
　　Testability. A relatively complete test method, test standard, various test equipment and instruments have been established to detect and identify the qualification and service life of PCB products.
　　Assembling. PCB products are convenient for standardized assembly of various components, and can also be automated and mass-produced. At the same time, PCB and various component assembly parts can also be assembled to form larger components, systems, and even complete machines. Maintainability
　　. Since PCB products and various component assembly parts are designed and mass-produced in a standardized manner, these parts are also standardized. Therefore, once a system fails, it can be replaced quickly, conveniently and flexibly to quickly restore the system to work. Of course, there are more examples. For example, making the system small and lightweight, and speeding up signal transmission.