In the case of a large number of interconnection and crossover requirements, if the PCB circuit board wants to achieve a satisfactory performance, it is necessary to expand the board layer to more than two layers, so there is a multilayer PCB circuit board, a multilayer PCB circuit board The original intention is to provide more freedom for the routing path.

The multi-layer PCB circuit board is composed of two or more conductive layers (copper layers) superimposed on each other, and the copper layer is bonded together by a resin layer (prepreg). The manufacturing process is more complicated, and it is a complex type of printed circuit boards. . What are the basic components of a multi-layer PCB circuit board?

　　1, signal layer

　　 Multi-layer PCB circuit board realizes information interaction mainly by having three signal layers, using soldering method, placing components and arranging signal lines in the multilayer PCB circuit board, so that the multi-layer PCB circuit board can achieve normal information service functions. Under the use of this kind of information layer, the multilayer PCB circuit board presents a good information interaction ability, and the use of this multilayer PCB circuit board can achieve the best electronic control ability.

　　2, internal power layer

The signal layer and internal power layer in the multi-layer PCB circuit board are connected to each other through the aperture to achieve the best electronic operation capability, and the internal power layer is a unique accessory. Under the use of this internal power layer, Able to achieve *** connection.

　　3, mechanical layer

Accessories for indicative information about plate making and preparation methods. In the use of multilayer boards, the border of the circuit board can be drawn, and the best processing technology can be placed to achieve a simple layout of the page. This mechanical layer also makes the process connection more Clear and lively.