FR-4 is a code name for a flame-resistant material grade. It means a material specification of which the resin material must be self-extinguishing after being burned. It is not a material name, but a material grade, There are many types of FR-4 grade materials used in the board at the current moment, but most of them are composite materials made of so-called four-function (Tera-Function) epoxy resin plus filler (Filler) and glass fiber.

FR-4 epoxy glass cloth laminate, according to the application, it is generally called the following names in the industry: FR-4 Epoxy Glass Cloth, insulation board, epoxy board, epoxy board, brominated epoxy board, FR-4 , fiberglass board, fiberglass board, FR-4 reinforcing board, FPC reinforcing board, flexible circuit board reinforcing board, FR-4 epoxy board, flame retardant insulation board, FR-4 laminated board, epoxy board , FR-4 light board, FR-4 glass fiber board, epoxy glass cloth board, epoxy glass cloth laminate, circuit board drilling pad.

Main technical features and applications: stable electrical insulation performance, good flatness, smooth surface, no pits, standards thickness tolerance , suitable for high performance electronic insulation requirements, such as FPC reinforcement board, PCB drilling pad, glass Fiber meson, potentiometer carbon film printing fiberglass board, precision star gear (wafer grinding), precision test board, electrical (electrical) equipment insulation struts, insulation pads, transformer insulation board, motor insulation parts, grinding gears, Electronic switch insulation board, etc.