... Product Description 1,multilayer printed circuit board/pcb,8-layer2,base material:fr-4 epoxy resin3,board thickness:2.0mm4,min ... )Solder Mask:green/red/blue/white/yellow.etc,as required4)Base Material:fr-4,cem-1,cem-3,ceramics,high tg ... .5n/mm19)Solder Mask Abrasion:>5H 20)Inflammability:94vo21)Certificate:ISO9002,UL,SGS22)Special Technology:blind and buried vias,impedance control ...