These double-sided printed circuit boards are now produced in thicknesses from 0.1 to 3.2 millimetres. If necessary, they can also be fitted with a metal core for higher thermal conductivity and copper inlays to manage waste heat. Double-sided printed circuit boards are used in electrical switches, air conditioning systems, ABS systems, airbags and taillights, for example.
Double-sided printed circuit boards with a metal core of copper or aluminum are mainly found in LED lamps for lighting systems. A rather more complex version with small copper discs as inlays is used in the automotive industry so that control systems components that generate a lot of heat can be used directly on the circuit board.