... of PCB, PCB boards, PCB circuit, circuit board,electronic pcb, Copy PCB, design PCB, prototype PCB, PCB fabrication, PCB layout, we are professional PCB factory ... ( RoHS Compliants) Item Mass ProductionPilot Run ProductionCapacityCapacity Layer Counts1L—18L, HDI20-28 , HDI MaterialCEM-1 ... 0.076MM NPTH:±0.05mmMini hole ring (single 0.075MM0.05MMOuterLayer Copper Thickness 17um--175um175um-- ...