How are the inner layers of a multilayer PCB printed? PCBs can be single sided, double sided or multi-layered. Multi-layer PCBs are boards which have copper layers in the outside and inner portions.

Many readers are certainly familiar with the process for home-etching of PCBs: it’s considered very straightforward, if a little involved, today. This was not the case in my youth, when I first ...

Once a printed circuit board (PCB) has been assembled it’s rather hard to look inside of it, which can be problematic when you have e.g. a multilayer PCB of an (old) system that you really would like ...