Introdução às placas de circuito impresso

PCB (printed circuit board) is a printed circuit board, or PCB for short, which is one of the important components of the electronics industry. Almost every electronic device, 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, must use printed circuit boards to make electrical interconnections between the components. The printed circuit board consists of an insulating base plate, connecting wires, and pads for assembling and welding electronic components. It has the dual functions of a conductive circuit and an insulating base plate. It can replace complex wiring to achieve electrical connections between components in the circuit, which not only simplifies the assembly and welding of electronic products, reduces the wiring workload under traditional métodos e reduz bastante a intensidade do trabalho dos trabalhadores; it also reduces the size of the whole machine, reduces product costs, and improves the quality and reliability of electronic equipment. The printed circuit board has good product consistency. It can adopt standardized design, which is conducive to mechanization and automation in the production process. At the same time, the entire assembled and debugged printed circuit board can be used as an independent spare part, which is Conveniente para o intercâmbio e manutenção de todo o produto . atualmente, as placas de circuito impresso foram extremamente amplamente utilizadas na produção e fabricação de produtos eletrônicos .
The earliest printed circuit boards used were paper-based copper-clad printed circuit boards. Since the emergence of semiconductor transistors in the 1950s, the demand for printed circuit boards has risen sharply. In particular, the rapid development and widespread application of integrated circuits have made the size of electronic equipment smaller and smaller, and the density and difficulty of circuit wiring have become Cada vez mais, o que requer a atualização contínua das placas de circuito impresso . atualmente, as variedades de placas de circuito impresso foram desenvolvidas a partir de placas de um lado para placas duplas, placas de várias camadas e placas flexíveis; A estrutura e a qualidade também se desenvolveram com densidade ultra-alta, miniaturização e alta confiabilidade; new design methods, design supplies and board materials, board making processes continue to emerge. In recent years, various computer-aided design (CAD) printed circuit board application software has been popularized and promoted in the industry. In specialized printed circuit board manufacturers, mechanized and automated production has completely replaced manual operations.