... FR4 for 4 layer mass production pcb__________________________________________________________________________________________________ PCB Manufacture Capability ItemCapability 1.Base MaterialFR-4 ... 8%5.Max panel sizeā¤2sidesPCB: 600*1500mmMultilayer PCB: 500*1200mm6.Min conductor line width/spacingInner layers ... file, PROTEL series, PADS series, POWER PCB series, AutoCAD series. FR4 for 4 layer ...