Multilayer PCBs are printed circuits manufactured up of over two layers. They must as a result have at least three layers of conductive product within the insulating product. Then again, double-sided PCBs have only two layers of conductive materials, the highest and the bottom. Based on pin count and density, https://10-layer2-orderhdimultila61504.yomoblog.com/37617276/goldfinger-pcb-for-electronics-industry-secrets