... 4/4mil Minimum Line Width/Spacing, BGA, 1.6mm Board Thickness and RoHS Mark1.UL,SGS,ROHS,IS09001,CE, ... with BGA 1.Base Material:fr42.copper thickness:2oz3.board thickness:1.6mm4.Surface treatment:ENIG5.layer:4- ... thickness0.015" (0.4mm)-0.125" (3.2mm) Board Thickness Tolerance± 10%Cooper thickness1/2OZ-3OZImpedance Control± 10% ... 4/4mil Minimum Line Width/Spacing, BGA, 1.6mm Board Thickness and RoHS Mark