How to make a 4-layer PCB [video]
The process of creating the printed circuit boards is very time consuming and has a lot of steps.
We all know how to make single and double layered PCBs (many of us made a 2-layer PCB with success at home) but this video goes into detailed factory steps in making a four layer PCB. It is very interesting to see how it is all done in factory in large scale.
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