The Chinese name of PCB is Printed Circuit Board (PCB), which appears in almost every electronic device. If there are electronic parts in a certain device, they are all mounted on PCBs of different sizes. In addition to fixing various small parts, the main function of the PCB is to provide electrical connections between the upper parts. As electronic devices become more and more complex, more and more parts are needed, and the circuits and parts on the PCB are becoming more and more dense. There are no parts on the standard PCB, and it is often called "Printed WiringBoard (PWB)".

Introduction to related knowledge about PCB classification, characteristics and functions

PCB classification

Classification according to the number of circuit layers: divided into single-sided, double-sided and multi-layer boards. Common multi-layer boards are generally 4-layer boards or 6-layer boards, and complex multi-layer boards can reach more than a dozen layers.

The PCB board has the following three main types of division:

1. Single panel

The single-sided board is 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 device is on the other side).

2. Double panel

The double-sided board has wiring on both sides, but to use two-sided wires, there must be a proper circuit connection between the two sides.

3. Multilayer board

In order to increase the area that can be wired, multi-layer boards use more single or double-sided wiring boards.