Brief description about the rigid-flexible pcb board: 1.PI+FR4,1.6mm,H/H,Lead ... layer thickness 0.075mm (3Mil) Minimum SMD pad pitch 0.5mm (20Mil) Finishes HAL, LHAL, Gold plate, ENIG, OSP, Immersion silver ... Optical Inspection) Yes Standards IPC-6013 ISO-9001-2008 rigid-flexible pcb board