Definitions for "FR-4"
Keywords:  epoxy, retardant, flame, pcbs, laminate
A NEMA grade of Flame-Retardant industrial laminate having a substrate of woven-glass fabric and resin binder of epoxy
A designation for a flame retardant that contains bromide.
The UL-designated rating for a laminate composed of glass and epoxy that meets a specific standard for fire-retardance. FR-4 is the most common dielectric material used in the construction of PCBs.