There are many ways to classify circuit boards.
One of the most common classification methods is to classify according to the number of layers. Circuit boards can be divided into three categories.
According to the number of layers
1. Single-sided circuit board
Single-sided PCB is the simplest and most basic PCB board, as the name implies: because its wires only appear on one side, this kind of PCB is called a single-sided circuit board. Single-sided boards are usually simple to manufacture and low in cost, but the disadvantage is that they cannot be applied to products that are too complex.
2. Double-sided circuit board
Double-sided boards are an extension of single-sided boards. When single-layer wiring cannot meet the needs of electronic products, double-sided boards should be used. There are copper-clad wires on both sides, and the lines between the two layers can be connected through vias to form the required network connections.
3. Multilayer circuit boards
The Multi-layer board refers to a printed board with more than three conductive pattern layers and insulating material between them laminated at intervals, and the conductive patterns between them are interconnected as required. Multilayer circuit boards are the product of the development of electronic information technology in the direction of high speed, multi-function, large capacity, small volume, thinner and lighter weight.
Classified according to the rigidity and flexibility of PCB:
The rigid circuit boards usually refer to our common PCB board. Its base material is generally FR4 material with a certain rigidity on the surface. It is our most common and most widely used PCB board type
Flexible Printed Circuit (FPC) is a highly reliable and excellent flexible printed circuit board made of polyimide or polyester film. It has the characteristics of high wiring density, lightweight, thin thickness, and good bendability.
3. Rigid-flex PCB
The birth and development of FPC and PCB gave birth to a new product of Rigid-Flex boards. Therefore, the rigid-flex board is the combination of the flexible circuit board and the rigid circuit board. After pressing and other processes, they are combined according to the relevant process requirements to form a circuit board with FPC characteristics and PCB characteristics.
Classified by PCB characteristics:
According to the classification in this way, there are many types of circuit boards.
For example, according to the characteristics of the hole to classify, it can be divided into a through-hole plate, blind buried hole plate, resin plug hole plate, half-hole plate;
According to the characteristics of the substrate, it can be classified into FR4 board, FPC, copper substrate, aluminum substrate, a ceramic substrate, high-frequency board, high-speed board, etc.;