6-layers Flex-Rigid PCB Min. line width/space : 0.1/0.1mm Min hole: 0.2mm for mechanical, 0.1mm for laser Board thickness : 1.6mm Finished surface: Immersion gold Material: Polyimide(PI) and FR-4 Impedance: 50 ohm for rigid board , 50 ohm for flex board Layer: 4 layers for rigid board, 2 layers for Flex Type: HDI , L1-L2 laser drill by 0.1mm, VIA ON PAD technology Application: IoT smart electronics production