computer PCB 17 years of experience in PCB industry fast delivery ... ,SGS,ISO9001,RoHS,QS9000,TS16949 Layer:1~22 layersMaterials: FR-4, CEM-3, Teflon, Aluminum, Rogers, High TgSurface finished:Lead Free ... "0.40mm7Max. Copper Thickness 4oz140μm8Max. Board Thickness 0.189"4.80 mm9Min Board Thickness2L0.008"0.20mm 4L0.016"0 ...