Fr4 Pcb Material. In china fr4 is the most widely used pcb base material next is fr1 then fr2. Fr 4 or fr4 is a nema grade designation for glass reinforced epoxy laminate material.
Fr stands for flame retardant and does not denote that the material complies with the standard ul94v 0 unless testing is performed to ul 94 vertical flame testing in. The maximum ambient temperature is between 120 o and 130 o c depending on thickness. Fr4 pcb material properties fr 4 is the primary insulating backbone upon which the vast majority of rigid printed circuit boards pcbs are produced.
Fr4 sheets are electrical insulators with high dielectric strength.
Boards made from fr4 are strong water resistant and provide good insulation between copper layers that minimizes interference and supports good signal integrity. It is the most commonly used pcb material. Fr4 is rightly the most used material in pcb construction. Fr4 pcb material properties fr 4 is the primary insulating backbone upon which the vast majority of rigid printed circuit boards pcbs are produced.
