According to the different layers, circuit boards are mainly divided into three categories: single panel, double-sided board, and multi-layer circuit board. The circuit board soldering manufacturer in Shanghai pointed out that the first is the single panel. On the most basic PCB, components are concentrated on one side, while wires are concentrated on the other side. Due to the fact that the wires only appear on one side, this type of PCB is called a single-sided circuit board. Single panel manufacturing is usually simple and cost-effective, but the disadvantage is that it cannot be applied to overly complex products. Double panel is an extension of single panel. When single-layer wiring cannot meet the requirements of electronic products, double-sided boards should be used. Both sides of the double-sided board are covered with copper wires, and the lines between the two layers can be connected through through holes to form the required network connection.

Multilayer board refers to a printed circuit board composed of three or more conductive pattern layers and insulating materials between them, which are laminated in a spaced manner. The conductive patterns can be connected to each other as needed. Multilayer circuit boards are a product of the development of electronic information technology towards high speed, multifunctionality, large capacity, small size, and lightweight.