A halogen-free printed circuit board (PCB) is a type of circuit board that does not contain any halogenated flame retardant additives in its construction. Halogenated flame retardants, such as brominated and chlorinated compounds, have been traditionally used in the manufacturing of electronic components to reduce the risk of fire.

Halogen-free PCBs have become increasingly popular in recent years as more electronics manufacturers strive to reduce their environmental impact and improve the safety of their products. They are commonly used in a variety of applications, including consumer electronics, telecommunications, automotive, and medical devices.