FR4 Sheet main technical features and applications: stable electrical insulation performance, good flatness, smooth surface, no pits, thickness tolerance standard, suitable for products with high performance electronic insulation requirements, such as solar panel, ,new energy board,FPC reinforcement board, PCB drilling pad, glass Fiber meson, potentiometer carbon film printed glass fiber board, precision planetary gear (wafer grinding), precision test plate, electrical (electrical) equipment insulation stay spacer, insulation pad, transformer insulation board, motor insulation, grinding gear, Electronic switch insulation board, etc.