When it comes to printed circuit boards, an immediate question before design is whether to use single or multi layered PCBs for your circuit. The benefit and use of each depends entirely on what you’re intending to do.
First we should define each type of circuit board.These PCBs simply have components on one side of the board and the conductor pattern on the other side. This reason is why it’s known as a single sided or single layer PCB. Often, these are used for simpler devices as no wires can cross if the circuit is to function correctly. These are usually slightly cheaper to manufacture than multi layer PCBs.
Multi layer PCBs
Multilayer PCBs have one or multiple conductor patterns inside the board, this increases the area available for wiring. By laminating or gluing several double-sided circuit boards together with insulating layers in between. Frequently between 4 and 8 layer PCBs are used as these offer the right amount of complexity for most purposes. There is the capacity for more layers however depending on device. These are likely to be different depending on the various device. Some smart phones for example are said to use 12 layers due to the various demands of the circuit. Often they have an even number of layers as odd layers can lead to issues with the circuit board. This includes problems like warping and twisting after soldering, and no cost savings as they’re not the standard to produce.
How to identify a multi layer PCB
If you have some PCBs to hand and you’re interested in how many layers it uses, there is a way to see without causing damage to the board itself. And we should know that common uses for multi layer PCBs as below:
4,X ray equipment