Board), the Chinese name is printed circuit board, also known as printed circuit board. It is an important electronic component, the support of electronic components and the carrier of electrical interconnection of electronic components. Because it is made by electronic printing, it is called "printed" circuit board.
PCB (printed circuit)
Board), that is, printed circuit board, is one of the important components of electronic industry. Almost every kind of electronic equipment, from electronic watches and calculators to computers, communication electronic equipment and military weapon systems, as long as there are electronic components such as integrated circuits, printed boards are used to electrically interconnect the components. Printed circuit board (PCB) is composed of insulating bottom plate, connecting wires and bonding pads. It is used to assemble and weld electronic components and has the dual functions of conducting wires and insulating bottom plate. It can replace complex wiring and realize the electrical connection between components in the circuit, which not only simplifies the assembly and welding of electronic products, but also reduces the workload of traditional wiring and greatly reduces the labor intensity of workers. But also reduces the volume of the whole machine, reduces the product cost and improves the quality and reliability of electronic equipment. The consistency of printed circuit board products is good, and standardized design can be adopted, which is beneficial to realize mechanization and automation in the production process. At the same time, the whole assembled printed circuit board can be used as an independent spare part, which is convenient for the interchange and maintenance of the whole machine products. At present, printed circuit boards have been widely used in the manufacture of electronic products.
Paper-based copper-clad printed boards were first used for printed circuit boards. Since the appearance of semiconductor transistors in 1950s, the demand for printed circuit boards has risen sharply. Especially with the rapid development and wide application of integrated circuits, the volume of electronic equipment is getting smaller and smaller, and the density and difficulty of circuit wiring are getting bigger and bigger, which requires printed boards to be constantly updated. At present, the varieties of printed boards have developed from single board to double board, multilayer board and flexible board; The structure and quality are also developing towards ultra-high density, miniaturization and high reliability; New design methods, design supplies, plate-making materials and plate-making processes are constantly emerging. In recent years, various application softwares of computer aided design (CAD) printed circuit boards have been popularized in the industry. In professional printed circuit board manufacturers, mechanized and automated production has completely replaced manual operation.