Multilayer PCBs, as opposed to their conventional counterparts with one or two conductive layers, come with a sandwich of several copper-clad laminates. This category features any PCB with four or more conductive layers. Imagine these PCBs as a sandwich, with multiple double-sided conductive layers separated by sheets of insulating material. These layers are bonded under high pressure and heat to ensure no air gaps and a sturdy structure. The real advantage of these advanced boards lies in their enhanced durability, space-saving design, and capability to support more complex circuit designs.