Flexible Printed Circuit Board, Soft PCB, FPC, Flex cable,spray tin, immerse gold, Gold-plating, OSP ... PCB,Immersed gold PCB,HDI mobilephone PCB,Gold-plating PCB,FPC board.PCB Assembly,PCBA,smt PCBA,OSP Type: FPClayers: ... pasting adhesive and stiffener: ±0.3mmPunching die dimension tolerance (hard die): ±4 milsPunching die dimension tolerance (soft die): ±12 milsImpedance tolerance (minimum): ± 10% ...