4Layer FR4 PCBs ENIG Blind Hole-FD11You are here: HomeFR4 PCB4Layer FR4 PCBs ENIG Blind Hole-FD11 4Layer-FR4 PCBs-ENIG- Blind Hole Base Material: fr4 laminate Layer: 4ayer Surface finished: ENIG Profile: CNC+V-cut Copper thickness: 1OZ Board thickness: 1.6mm Break down voltage for insulated layer: >2kV