Because single-sided boards have many strict restrictions on the design of the circuit (because there is only one side, the wiring cannot cross and must be around a separate path), so only early circuits use this type of board.ĭouble-Sided Boards (Double-Sided Boards) This type of circuit board has wiring on both sides, but to use two-sided wires, there must be a proper circuit connection between the two sides. Because the wires only appear on one side, this kind of PCB is called a single-sided (Single-sided). Single-Sided Boards On the most basic PCB, the parts are concentrated on one side, and the wires are concentrated on the other side (when there are SMD components and the wires are on the same side, the plug-in devices are on the other side). PCB board has the following three main types of division: Common multilayer boards are generally 4-layer boards or 6-layer boards, and complex multilayer boards can reach dozens of layers. The printed circuit board actually belongs to the integrated circuit industry, but the accuracy is only one ten thousandth of the current mainstream integrated circuit.Īccording to the number of circuit layers: divided into single-sided, double-sided and multi-layer boards. Over the years, the high density of printed boards has been able to develop correspondingly with the improvement of integrated circuit integration and the advancement of mounting technology. It is the key electronic interconnection of electronic products and is known as the "mother of electronic products". The main function of PCB is to connect various electronic components to a predetermined circuit, and play the role of relay transmission. If there are electronic parts in a certain device, they are all mounted on PCBs of different sizes. Printed circuit boards appear in almost every electronic device.
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Since the mid-1950s, printed circuit boards have been widely used. In 1948, the United States officially approved this invention for commercial use. In 1943, Americans mostly used this technology for military radios. The creator of PCB is Austrian Paul Eisler (Paul Eisler), in 1936, he first used a printed circuit board in the radio.
#WHAT IS PCB MANUAL#
In specialized printed circuit board manufacturers, mechanized and automated production has completely replaced manual operations.
#WHAT IS PCB SOFTWARE#
In recent years, various computer-aided design (CAD) printed circuit board application software has been popularized and promoted in the industry. At present, the variety of printed boards has developed from single-sided boards to double-sided boards, multilayer boards and flexible boards structure and quality have also 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 particular, the rapid development and widespread application of integrated circuits have made electronic equipment smaller and smaller, and circuit wiring density and difficulty increasing, which requires continuous updating of printed boards. Since semiconductor transistors appeared in the 1950s, the demand for printed boards has risen sharply. The earliest printed circuit boards used paper-based copper-clad printed boards. At present, printed circuit boards have been extremely widely used in the manufacture of electronic products. At the same time, the whole printed circuit board that has been assembled and debugged can be used as an independent spare part to facilitate the interchange and maintenance of the entire product. The printed circuit board has good product consistency, and it can adopt standardized design, which is conducive to the realization of mechanization and automation in the production process. It not only simplifies the assembly and welding of electronic products, reduces the workload of wiring in the traditional way, and greatly reduces the labor intensity of workers but also reduces the overall machine Volume, reduce product cost, improve the quality and reliability of electronic equipment. It can replace complex wiring and realize the electrical connection between the components in the circuit.
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The printed circuit board is composed of an insulating bottom plate, connecting wires and pads for assembling and welding electronic components, and has the dual functions of conductive lines and insulating bottom plates. Almost every kind of electronic equipment, from electronic watches, calculators, to computers, communication electronic equipment, military weapon systems, as long as there are electronic components such as integrated circuits, in order to make the electrical interconnection between the various components must be printed board. PCB (printed circuit board) is abbreviated as printed circuit board, which is one of the important parts of the electronics industry.