What are the classifications of PCB circuit boards (circuit boards)?

What is a single-sided double-sided multi-layer board? 
PCB boards are classified according to the number of circuit layers: 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. It has the following three main types of division:
  Single panel: On the most basic PCB, the parts are concentrated on one side, and the wires are concentrated on the other side. Because the wires only appear on one side, this kind of PCB is called a single-sided (Single-sided). Because the single-sided board has many strict restrictions on the design of the circuit (because there is only one side, the wiring cannot cross and must be a separate path), so only early circuits use this type of board.
  Double-sided board: This kind of circuit board has wiring on both sides, but to use two-sided wires, there must be a proper circuit connection between the two sides. The “bridges” between such circuits are called vias. A via is a small hole filled or coated with metal on the PCB, which can be connected to the wires on both sides. Because the area of ​​the double-sided board is twice as large as that of the single-sided board, and because the wiring can be interleaved (it can be wound to the other side), it is more suitable for use in circuits that are more complicated than the single-sided board.
  Multilayer board: In order to increase the area that can be wired, the multilayer board uses more single or double-sided wiring boards. Use one double-sided as the inner layer, two single-sided as the outer layer or two double-sided as the inner layer and two single-sided as the outer layer of the printed circuit board. The positioning system and the insulating bonding material alternately together and the conductive pattern Printed circuit boards that are interconnected according to design requirements become four-layer or six-layer printed circuit boards, also known as multilayer printed circuit boards. The number of layers of the board means that there are several independent wiring layers. Usually the number of layers is even and contains the two outermost layers. Most motherboards have 4 to 8 layers of structure, but technically, PCB boards with nearly 100 layers can be achieved in theory. Most large supercomputers use fairly multi-layer motherboards, but because this type of computer can already be replaced by a cluster of many ordinary computers, super-multilayer boards are gradually not being used.
Because the layers in the PCB are tightly integrated, it is generally not easy to see the actual number, but if you look closely at the motherboard, you can still see it.
   According to the soft and hard classification: divided into ordinary circuit boards and flexible circuit boards. The raw material of PCB is copper clad laminate, which is the substrate material for making printed circuit boards. It is used to support various components, and can achieve electrical connection or electrical insulation between them. Simply put, a PCB is a thin board with integrated circuits and other electronic components. It will appear in almost every electronic device.


Post time: Dec-17-2021