PCB board is printed circuit board, also known as printed circuit board, which is the provider of electrical connections for electronic components.
PCB boards can be divided into single-panel, double-panel, four-layer boards, six-layer boards and other multi-layer circuit boards according to the number of circuit board layers.
Since printed circuit boards are not general terminal products, the definition of names is slightly confusing. For example, the motherboard used in personal computers is called a motherboard, but cannot be directly called a circuit board. Although the motherboard is There are circuit boards, but they are not the same. Therefore, when evaluating the industry, the two are related but cannot be said to be the same.
Another example: Because there are integrated circuit parts mounted on the circuit board, the news media calls it an IC board, but in fact it is not the same as a printed circuit board. What we usually call a printed circuit board refers to a bare board - a circuit board without components.
The current circuit board mainly consists of the following:
Circuit and pattern (Pattern): The circuit is used as a tool for conduction between original components, and will be designed separately in the design. The large copper plane serves as the ground and power plane. The lines and drawings are made at the same time.
Dielectric layer (Dielectric): used to maintain the insulation between circuits and layers, commonly known as base material.
Through hole/via: Via holes can connect circuits at two or more levels to each other. Larger via holes are used as component plug-ins. There are also non-through holes (nPTH). ) is usually used as surface mount positioning and for fixing screws during assembly.
Extended information:
The main advantages of using printed boards are:
1. Due to the repeatability (reproducibility) and consistency of graphics, it reduces Errors in wiring and assembly save time in equipment maintenance, debugging and inspection;
2. The design can be standardized and facilitate interchange;
3. High wiring density and small size , light weight, conducive to the miniaturization of electronic equipment;
4. Conducive to mechanized and automated production, improving labor productivity and reducing the cost of electronic equipment.
5. Especially the bending resistance and precision of FPC flexible boards can be better applied to high-precision instruments (such as cameras, mobile phones, video cameras, etc.).
Reference materials:
Baidu Encyclopedia-Printed Circuit Board