... 3.17 years of experience in PCB industry 4.UL,SGS,ISO9001,RoHS,QS9000 and TS16949 Layer: ... 1~22 layersMaterials: FR-4, CEM-3, Teflon, Aluminum, Rogers, High TgSurface ... 0.10 - 0.15mm Aspect Ratio 1 : 11 : 14Min. Line Width/Spacing½oz / 18um0.003" / 0.003"0.075 ... . Copper Thickness 4oz140μm8Max. Board Thickness 0.189"4.80 mm9Min Board Thickness2L0.008"0.20mm 4L0.016 ...