... PCB board 15 years of experience in PCB industry. Good after services. UL,SGS,ISO9001,RoHS,QS9000 and TS16949 Our PCB got UL,SGS,ISO9001,RoHS ... .40mmMaximum copper thickness: 140μm (4oz)Maximum board thickness: 4.80 mmMinimum board thickness: 2L 0.20mm, 4L 0.40mm, ... impedance (Ω): ±7% to 10%Production capacity Double sided PCB :200000 ft2 /MonthMultilayer PCB :320000 ft2/MonthHDI PCB : 80000 ft2/Month