What is a PCB circuit board?

PCB is the printed circuit board, also known as the printed circuit board, which is the provider of electrical connection of electronic components.

PCB can be divided into single board, double board, four-layer board, six-layer board and other multi-layer boards according to the number of circuit boards.

Because the printed circuit board is not an ordinary end product, the definition of the name is a bit confusing. For example, a motherboard for a personal computer is called a motherboard, but it cannot be directly called a circuit board. Although there are circuit boards in the motherboard, they are different, so they are related, but they cannot be said to be the same when evaluating the industry.

Another example: because the circuit board is loaded with integrated circuit components, the news media call it an IC board, but it is not the same as the printed circuit board in essence. The printed circuit board we usually refer to is a bare board-that is, a circuit board without components.

The current circuit board mainly consists of the following parts:

Circuit and pattern: The circuit is a communication tool between the original parts, and a large copper surface will be designed as the grounding and power layer in the design. Lines and graphs are made at the same time.

Dielectric layer: used to keep the insulation between lines and layers, commonly known as substrate.

Through hole/via hole: A through hole can connect two or more layers of circuits with each other, and the larger through hole is used as a component plug-in. In addition, there is a non-through hole (nPTH), which is usually used for surface mount positioning and fixing screws during assembly.

Extended data:

The main advantages of using printed circuit boards are:

1. Due to the repeatability (reproducibility) and consistency of graphics, errors in wiring and assembly are reduced, and the time for equipment maintenance, debugging and inspection is saved;

2, the design can be standardized, which is conducive to interoperability;

3. High wiring density, small volume and light weight, which is beneficial to miniaturization of electronic equipment;

4. It is conducive to mechanized and automated production, improving labor productivity and reducing the cost of electronic equipment.

5. Especially the flexibility and precision of FPC flexible board are better applied to high-precision instruments (such as cameras, mobile phones, video cameras, etc.). ).

References:

Baidu encyclopedia-printed circuit board