... are professional PCB factory Quality ,every product through In-circuit, functional tests& burn-in tests, full system test,100% e-test ... -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, ...