Product Model: Semi Rigid-Flex PCB (R-FPCB) Material: FR-4 + PI Layer Structure: 6 Rigid Layers / 2 Flexible Layers Solder Mask: Green / White Finished Thickness: Rigid 0.8mm, Flex 0.15mm Copper Thickness: 1oz Surface Treatment: Immersion Gold Min. Trace / Space: 2.5mil/2.5mil Application: Communication PCB