PCB board classification and features

PCB board is an important electronic component, it is the support body of electronic components, and is the carrier of electrical connection of electronic components. It’s main division type can be multi-layer board, double layer board and single layer board according to the classification of circuit layers. SDY will tell you what features the PCB board has.

The classification of PCB board

1. Single layer board: Single-Sided Boards are on the most basic PCB. The parts are concentrated on one side, and the wires are concentrated on the other side (when there are patch components, the wires are on the same side, and the plug-in devices are on the other side) Because the wire only appears on one side, the PCB is called a single-sided. Because the single-panel has many strict restrictions on the design line (because there is only one side, the wiring can not cross and must be around the path alone). ), so only early circuits use such boards.

2. Double-Sided Boards: double-sided (Double-Sided Boards). This kind of circuit board has wiring on both sides, but to use the two sides of the wire, you must have appropriate circuit connection between the two sides. This bridge between the bridge "called a via. The via is a small hole filled or coated with metal on the PCB. It can be connected to the two sides of the wire. Because the area of the double panel is twice as large as the single panel, the double panel is solved. In a single panel, because of the difficulty of wiring interleaving (which can be conducted through the hole to the other side), it is more suitable for circuits that are more complicated than single panels.

3. Multi-Layer Boards: In order to increase the area that can be routed, multi-layer boards use more single or double-sided wiring boards. Use one double-sided inner layer and two single-sided outer layers. Or two printed circuit boards with double-sided inner layer and two single-sided outer layers, the printed circuit board which is alternately arranged by the positioning system and the insulating bonding material and the conductive pattern is interconnected according to design requirements becomes four layers, Six-layer printed circuit board, also known as multi-layer printed circuit board.

The number of layers of the board does not mean that there are several layers of independent wiring layers. In special cases, empty layers are added to control the thickness of the board. Usually the number of layers is even and the outermost two layers are included. Most of the motherboards are 4 to 8 layer structure, but technically can achieve nearly 100 layers.

Large supercomputers mostly use quite a few motherboards, but because such computers can be replaced by clusters of many common computers, super-multilayer boards are gradually being used. Because the layers in the PCB are tight. The combination is generally not easy to see the actual number, but if you look closely at the motherboard, you can still see it.

PCB board features

1. High density

For decades, the high density of printed boards can be developed with the integration of integrated circuits and advances in installation technology.

2. High reliability

Through a series of inspections, tests and aging tests, the PCB can be guaranteed to work reliably for a long time.

3. Designability

For the various performances of PCB (electrical, physical, chemical, mechanical, etc.), the design of printed boards can be realized through design standardization and standardization, with short time and high efficiency.

4. Producability

With modern management, it can carry out standardization, scale (quantity), automation and other production to ensure product quality consistency.

5. Testability

Established a relatively complete test method, test standards, various test equipment and instruments to detect and identify PCB product qualification and service life.

6. Assembleability

PCB products not only facilitate the standardized assembly of various components, but also can be automated, large-scale mass production. At the same time, PCB and various component assembly components can be assembled to form larger components and systems until the whole machine.

7. Maintainability

Since PCB products and various component assembly components are standardized and scaled, these components are also standardized. Therefore, once the system fails, it can be replaced quickly, conveniently and flexibly to make the service system work.

 

Kindly please feel free to contact Kola@sdy-pcb.com or our engineer if you want more information on the PCB board classification and features.