The name of the circuit board are: ceramic circuit board, alumina ceramic circuit board, aluminum nitride ceramic circuit board, circuit board, PCB board, aluminum plate, high frequency board, thick copper plate, impedance board, PCB, ultra-thin circuit board Thin circuit boards, printed (copper etching technology) circuit boards and so on. The circuit board makes the circuit miniaturized and intuitive, which plays an important role in the mass production and optimization of the fixed circuit. Circuit board can be called printed circuit board or printed circuit board, the English name for (Printed Circuit Board) PCB, (Flexible Printed Circuit board) FPC circuit board  (FPC circuit board, also known as flexible circuit board flexible circuit board is poly Imide or polyester film made of a substrate with a high degree of reliability, excellent flexible printed circuit board with a high wiring density, light weight, thin thickness, good bending characteristics!) And soft and hard combination plate (reechas, Soft and hard combination plate) -FPC and PCB birth and development, gave birth to a soft and hard combination of this new product. Therefore, the soft and hard bonding board, that is, flexible circuit boards and rigid circuit boards, after pressing and other processes, according to the relevant process requirements together to form a FPC characteristics and PCB characteristics of the circuit board.
The board is divided into three categories: single-sided, double-sided, and multi-layer circuit boards.
The first is a single panel, on the most basic PCB, the parts are concentrated on one side, the wires are concentrated on the other side. Because the wire only appears in one side, so called the PCB is called single-sided circuit board. Single-sided panels are usually made simple, low cost, but the drawback is that it can not be applied to too complex products.
Double panel is an extension of a single panel, when the single-layer wiring can not meet the needs of electronic products, we must use the double-sided. Sided copper with a trace, and can pass through the hole between the two lines between the lines, so that the formation of the required network connection.
The multilayer board refers to a printed board having three or more conductive pattern layers interposed therebetween and interposed therebetween so that the conductive patterns are interconnected as required. Multi-layer circuit board is the electronic information technology to high-speed, multi-functional, large capacity, small size, thin, lightweight direction of the product.
The board is divided into soft board (FPC), hard board (PCB), hard and soft combination board (FPCB) according to the characteristics.
Board board editing
FR-1: flame retardant copper foil phenolic paper laminate. IPC4101 detailed specification number 02; Tg N / A;
FR-4: 1) Flame-retardant copper foil Epoxy E fiberglass laminate and its adhesive sheet material. IPC4101 detailed specification number 21; Tg ≥ 100 ℃;
2) Flame Retardant Copper Foil Modified or Unmodified Epoxy E Fiberglass Laminated Laminate and Bonding Sheet Material. IPC4101 detailed specification number 24; Tg 150 ° C to 200 ° C;
3) Flame Retardant Copper Foil Epoxy / PPO Glass Cloth Laminate and Its Adhesive Sheet Material. IPC4101 detailed specification number 25; Tg 150 ° C to 200 ° C;
4) flame retardant copper clad modified or unmodified epoxy glass cloth laminate and its adhesive sheet material. IPC4101 detailed specification number 26; Tg 170 ℃ ~ 220 ℃;
5) Flame Retardant Copper Foil Epoxy E Glass Cloth Laminate (for Catalytic Addition). IPC4101 detailed specification number 82; Tg N / A;
The domestic research on the automatic detection system for printed circuit boards began in the early 1990s and has just started. The research institutes that are engaged in this research are also relatively few, and because of the influence of various factors, the study of the automatic optical detection system for printed circuit board defects also stays at a relatively early level. Because of the foreign printed circuit board automatic detection system is too expensive, and the domestic did not develop a true sense of the printed circuit board automatic detection equipment, so most of the domestic circuit board manufacturers or use a magnifying glass or projector to see Approach to check the side. As a result of manual inspection labor intensity, the eye prone to fatigue, low leakage rate. And with the electronic products toward the miniaturization, digital development, printed circuit board is also moving towards high density, high precision development, the use of manual inspection method, the basic can not be achieved. For higher density and accuracy of the circuit board (0.12 ~ 0.10mm), has been completely unable to test. Detection means of backward, leading to the current domestic multi-layer board (8-12 layer) of the product pass rate of only 50 to 60%.