Product Model: Rigid-Flex PCB Plugged with Epoxy Resin Material: FR4 + PI Composite Substrate Layer Structure: 16 Rigid Layers + 2 Flexible Layers Copper Thickness: 1oz Finished Thickness: 1.0mm Surface Finish: Immersion Gold Min Hole Diameter: 0.2mm Trace/Space: 4mil/4mil (0.1mm/0.1mm) Special Process: Epoxy Resin Plugging Application: Digital Products PCB