PCB Technical - Common circuit boards are classified according to the number of layers and what are their uses?

With the continuous development of science and technology, the circuit board has gradually formed the current double-sided board and multi-layer board from the beginning of the single-sided board. Some friends are not very clear about the classification and use of the circuit board according to the number of layers. Let's talk about it in detail below. Say.

Circuit boards are classified and used according to the number of layers:
1. Single-sided PCB

The substrate material is mainly phenol copper laminate (paper phenol as the bottom and copper foil on top) and paper epoxy copper laminate.

Usage: Most of them are used in household appliances such as radios, AV appliances, heaters, refrigerators, washing machines, etc., as well as commercial machines such as printers, vending machines, circuit machines, and electronic components. The advantage is low prices.

2. Double-sided PCB

The substrate materials are mainly Glass-Epoxy copper laminates, Glass Composite (glass composite) copper laminates, and paper Epoxy copper laminates.

Usage: Mostly used in personal computers, electronic musical instruments, multi-function telephones, automotive electronic equipment, electronic peripherals, electronic toys, etc. As for Glass styrene copper laminates, Glass polymer copper laminates have excellent high-frequency characteristics and are mostly used in communication equipment, satellite broadcasting equipment, and mobile communication equipment. Of course, the cost is also high.

3. 3-4 layer PCB

The substrate material is mainly Glass-Epoxy or benzene resin.

Uses: Mainly personal computers, Me (Medical Electronics) machines, measuring machines, semiconductor testing machines, NC (Numeric Control) machines, electronic switches, communication machines, memory circuit boards, IC cards, etc., and glass Synthetic copper laminates are used as multi-layer PCB materials, mainly focusing on their excellent processing characteristics.

4. 6-8 layer PCB

The substrate material is still based on Glass-Epoxy or Glass benzene resin.

Usage: electronic switches, semiconductor testing machines, medium-sized personal computers, EWS (Engineering Work Station), NC and other machines.

5. PCB with more than 10 layers

The substrate is mainly made of Glass benzene resin material, or Glass-Epoxy is used as the multilayer PCB substrate material.

Usage: This type of PCB has special applications, most of which are large computers, high-speed computers, communication equipment, etc., mainly because of its high-frequency characteristics and excellent high-temperature characteristics.

6. Other PCB substrate materials

Other PCB substrate materials include aluminum substrates and iron substrates. The circuit is formed on the substrate.

Usage: Most of them are used in turning machines (small motors) cars.