PCB can be classified into a single panel, double panel, multi-layer board, flexible Printplaat (flexible board), rigid PCB board, rigid-flexible PCB board (rigid-flexible board), and so on. Printed Circuit Board (PCB), also known as Printed Circuit Board, is an important electronic component, is the support of electronic components, is the supplier of electronic components electrical connection, because it is made by electronic printing technology, so it is also called “Printed” Circuit Board. A PCB is simply a thin plate containing integrated circuits and other electronic components.

One, according to the circuit layer classification: divided into a single panel, double panel, and multi-layer board. The common multilayer board is usually 3-6 layers, and the complex multilayer board can reach more than 10 layers.

(1) single panel

On a basic printed circuit board, the parts are concentrated on one side and the wires are concentrated on the other. Because the wire appears on only one side, the printed circuit board is called a single panel. Early circuits used this type of circuit board because there were many strict restrictions on the design circuit of a single panel (because there was only one side, the wiring could not cross and had to be routed in a separate path).

(2) double panel

The circuit board has wiring on both sides. In order for the wires on both sides to communicate, there must be a proper circuit connection between the two sides, which is called the guide hole. Guide holes are small holes in a printed circuit board, filled or coated with metal, that can be connected to wires on both sides. Double panels can be used on more complex circuits than single panels because the area is twice as large and the wiring can be interlaced (it can be wound to the other side).