Multilayer PCB is a type of circuit board that contains three or more layers of conductive material. Here is a guide on multi-layer PCB stack-up and manufacturing processes.
PCB Fabrication Process
PCB is the necessary product of the electronic industry. Flexible PCB is a broad category of PCBs. According to the structure of FPC, it can be divided into a single-layer, double-sided, and multilayer flexible PCB according to the number of conductor layers.