أنشئ حسابًا أو سجّل الدخول للانضمام إلى مجتمعك المهني.
yes FR-4 is a grade designation assigned to glass-reinforced epoxy laminate sheets, tubes, rods and printed circuit boards (PCBs). FR-4 is a composite materialcomposed of woven fiberglass cloth with an epoxy resin binder that is flame resistant .