... —18L, HDI20-28 , HDI MaterialCEM-1,CEM-3,FR-4, High TG FR-4 , Halogen-free FR-4 , aluminium ,Ceramic(96% Alumina) ... TLX-9), Arlon(35N,85N)etc.Material Mixed Laminate4 layers -- 10 layers 12 layersFR4+Ro4350 , FR4+Aluminium , FR4+ FPCMaximum ... Mini Solder Mask Bridge0.05mm0.025mm Thickness01mm0.05mmImpedance Control Tolerance±10%±5%Surface FinishingHASL, Lead free HASL, Immersion gold, Immersion ...