2-layer rigid substrate

"The number of layers in a PCB" The number of layers in a PCB is determined by the number of copper layers. For example, if the design includes only one copper layer, it is a single-sided PCB. If there are two copper layers, it is a double-sided PCB, and if there are more than two copper layers, it is referred to as a multilayer PCB. Please refer to the diagram below. "Manufacturing Process of Multilayer PCBs" How do PCB manufacturers produce multilayer PCBs? Below, we will explain using a 6-layer substrate as an example. The PCB manufacturer first completes the inner layers and then laminates them with insulating material (prepreg) in between the completed inner layers. Once all layers are correctly positioned, they are pressed together into one. "Double-sided PCB vs. Multilayer PCB" The difference between a double-sided PCB and a multilayer PCB is that a double-sided PCB does not have inner layers and does not require a lamination process. "Single-sided PCB vs. Multilayer PCB" On the other hand, a single-sided PCB does not have inner layers and does not require a PTH (plated through hole) process.