Double-sided PCBs are produced using a method that starts off with a substrate of insulating content, followed by the application of a thin layer of conductive material on each side. The look is then transferred onto either side. It truly is the whole process of converting (printing) phototools onto the https://felixkprst.ageeksblog.com/30257467/8-layer-immersion-gold-soft-and-hard-combination-pcb-no-further-a-mystery