According to different location of metal core and trace layers of PCB, right now, we divide into five basic types:
Single Layer Metal Core PCB(only one trace layer one one side);
COB MCPCB (chip-on-board MCPCB, one trace layers);
Double Layers Metal Core PCB (two trace layers on the same side;
Double Sided Metal Core PCB (two trace layers on each side);
Multi Layers Metal Core PCB (More than 2 trace layers per board);