When should I use multilayer printed circuits?

Multilayer printed circuits are an essential source of resources in today's electronic development. The main reason for using four or more layer printed circuits is to have card-size copper planes connected to the reference voltage and supply (0V, GND, Vcc, etc.), which will serve as a shield for everything. Our circuit not only against parasitic noises generated by external agents but will also help us to ensure that our design is not a generator of electromagnetic radiation (EMI).

*4-layer PCB designed and assembled by UGNI*

In addition to obtaining power and ground connections directly from the component power terminals, the designer will have the real possibility to design conductive tracks suitable for circuits that are sensitive to noise, minimizing the size of the connections, the area of the loops. , and shared impedances which fully facilitate this objective in today's environment where external signal fields abound such as cell towers, Wi-Fi networks, electronic equipment that does not meet Electromagnetic Compatibility (EMC) standards.

The current technological advance of the electronics industry requires products that work at increasingly higher frequencies and that, in addition to being immune to noise, must concentrate the greatest functionality in the minimum possible space.

Due to continuous technological advancement, circuit developers must consider the problem generated by the working speed of processors and data buse. as well as the performance of serial transmissions that currently extend to the Giga Hertz range. Therefore, designs that require any of these characteristics must necessarily be implemented in multilayer circuits where there are resources to reduce electromagnetic emission and pollution (EMI).

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