When selecting the right substrate for your printed circuit board (PCB), understanding the key differences between aluminum PCBs and FR4 PCBs is crucial.
he FR4 PCBs are composed of woven fiber glass and epoxy resin with copper foil on one side. FR is the short form of Flame Retardant, a halogenated material used as a non-conducive layer with strong adherence to copper. They serve as a self-extinguisher laminating layer.