What is a 4 layer pcb

A 4 layer PCB (Printed Circuit Board) is a type of circuit board that has four layers of conductive material separated by insulating layers.

The layers are usually arranged in a sandwich-like structure,

with two outer layers of copper and two inner layers of copper.

The inner layers are connected to the outer layers through plated through-holes,

which allow electrical signals to pass between the layers.

4 layer PCBs are commonly used in complex electronic devices such as computers, smartphones, and medical equipment.

They offer better performance and reliability compared to 2 layer PCBs,

as they allow for more complex circuit designs and reduce the risk of signal interference.

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