853-049542-173 Printed circuit board

PCB(printed circuit board) is a printed circuit board, referred to as printed board, an important part of the electronics industry. Several calls of each electronic equipment, small to electronic watches and calculators, large to computers, communication electronic equipment, military weapon systems, as long as there are electronic components such as integrated circuits, in order to make the grid components 冱 connected, must use printed boards. The printed circuit board is composed of an insulating base plate, a connecting wire and a welding pad for assembling welded electronic components, and acts as a conductive line and an insulating base plate. It can replace the complex wiring, realize the electrical connection between the components in the circuit, not only simplifies the assembly of electrical products, welding work, reduce the traditional way of wiring workload, greatly reduce the labor intensity of workers; And reduce the volume of the whole machine, reduce the cost of products, improve the quality and reliability of electronic equipment. The printed circuit board has good product consistency, and it can adopt standardized design, which is conducive to mechanization and automation in the production process. At the same time, the whole assembled and adjusted printed circuit board can be used as an independent spare part, which is convenient for the exchange and maintenance of the whole machine product. Previously, printed circuit board E has been widely used in the manufacture of electronic products.
The earliest use of printed circuit boards is paper-based copper-coated printed boards. Since the advent of coconductor transistors in the 1950s, the demand for printed boards has risen dramatically. In particular, the rapid development of integrated circuits
Widely used, the size of electronic equipment is getting smaller and smaller, and the circuit wiring density and difficulty are getting greater and greater, which requires printed boards to be constantly updated. At present, the varieties of printed boards have developed from single panels to double panels, multi-layer boards and flexible boards; The structure and quality have also been developed to ultra-high density, miniaturization and high reliability; New design methods, design supplies and board making materials, and board making techniques continue to emerge. In recent years, a variety of computer aided design (CAD) printed circuit board application software has been popularized and expanded in the industry, in the specialized printed board manufacturers, mechanized, automated production has completely replaced the manual red operation.