PCB and its number of layers

Most engineers and people who are familiar with the world of electrical devices would agree that if we are talking about one of the most essential and indispensable component of the device, it would certainly be the PCB! This is an acronym which stands for Printed Circuit Boards and they are commonly seen in almost all of the electrical devices we have around us, save for the simplest ones. Printed Circuit Boards are made up of an insulating materials or semiconductor boards which is an important characteristic relative to its function. The surface of these boards are made up of copper tracks or wires that are etched and printed on it. This is where several wires coming from different components within a device enter. These printed circuit boards serve as a relay station. Imagine your brain which is the center of your body, and all other organs within are connected to the brain with the use of nerves. This is an analogy to the Printed circuit boards and their relative function within a device. Without them, there would be a failure for the rest of the components to establish communication between one another, and thus the device would fail to properly do its purpose or function.
Most of the simplest of layouts for devices involve only one layer of printed circuit boards. For example, motherboards in a computer is an example of these boards, and usually, we only see one layer of these. Boards in your cellular phones are also made up of only one layer of boards because of the relative easy function. However, for more complex functionality, we see an increase in the number of boards being used, which can be as many as two or possible even more! Multi layered PCBs are reserved for the most complex of circuits or layouts where one layered boards would not suffice.

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