Definition
The most basic pcb is named single layer pcb, it is a one layer board with copper on the top side.
Components mounting
traditional components
SMT components
Flow diagram
Definition
it is a 2 layers PCB with copper on both sides.
Components mounting
Flow diagram
Definition
a multilayer pcb has at least 3 layers.
Components mounting
Flow diagram
Components mounting
Flow diagram
Definition
Thin flexible pcb, interconnecting 2 rigid pcb.
Components mounting
Flow Diagram