The principle and application of multi-layer PCB board

The principle of multi-layer PCB board:

The biggest difference between PCB multi-layer board and single side, circuit printing service double panel is the addition of internal power layer and ground layer. The power supply and grounding network are mainly routed at the power layer. The two sides of each substrate layer on the PCB multilayer board have conductive metal, and the board is connected together with a special adhesive, and the insulating material is between the board and the board. However, PCB multi-layer wiring is mainly composed of the top layer and the bottom layer, and the middle wiring layer is supplemented.

Therefore, the design and research method of multi-layer PCB board is the same as the basic situation of dual panels. The key is how to optimize the wiring of the internal electrical layer of the enterprise, PCB fabrication company so that the wiring system of the circuit board is more scientific and reasonable. The inevitable product of multi-functional development, large capacity and small volume.

PCB is a similar printed circuit board, the general PCB is made of several layers bonded together, each layer has a different resin insulated substrate and metal and circuit layer. The basic PCB is divided into four layers. The top layer and the bottom layer are functional module circuits composed of a main circuit and components. The middle two layers are the ground layer and the power layer. This advantage is that the signal line can not be corrected in time, and it can also better shield interference.

In general, 4 layers are enough for the PCB to run, china PCB so the so-called 6 layers, 8 layers, 10 layers, in fact, increase the number of circuit layers to improve the capacitance of the PCB, that is, the voltage resistance. Therefore, the increase in the number of PCB layers means that more circuits can be designed inside.

When do I need to increase the number of PCB layers of memory? Based on the above, it is clear that the electrical strength of the printed circuit board is too high. Remember when the PCB voltage and current are strongest? Anyone who has ever played overclocking knows that in order to get better performance, memory must be pressurized to run more frequently. Therefore, it is not difficult to figure out when memory can be used for high frequency or overclocking.

Advantages of multi-layer PCB board:

Multilayer panels are smaller and lighter, making them ideal for smartphones or computers, or other products that require multifunctional packaging. There are some special benefits:

multi-layer PCB can make corporate culture products can obtain economic development to provide more functions.

The high assembly density means that the product can extend the service life of the board.

When the product does not require multiple independent PCB connectors, the structure will be simpler.

A rigorous testing process at the manufacturing stage Q means high quality, efficient products.

The electrical characteristics of multi-layer PCB are faster than that of single-layer PCB.

depending on the number of layers that an enterprise can choose to issue for information addition, multi-layer PCBS typically have developed structures that are well suited to rigid and flexible management systems.

At present, the frequency of high-end memory generally starts at 3600 MHZ, in order to ensure safety and electrical stability, 8-layer PCB is basically the standard, and some can even reach 10. The performance difference between 8-layer and 10-layer PCBS in the same format is negligible for everyday users, but for professional overclocking players, the latter allows them to get higher frequencies.

Third, the use of multi-layer PCB board:

Many industries and products can benefit from multi-layer PCBS, especially because of its durability, functionality, and lightweight. Here are some products that often use these boards:

computer

Heart monitor

Fire alarm

GPS and satellite systems

Industrial control