12-Layer PCB with Taconic Material, Immersion Tin, Impedance Controlled, Vias Plugged with Solder Mask, RoHS Compliance. 12-Layer PCB,Taconic Material,2.0mm Thickness,Immersion ... Gold, Immersion Tin, Immersion Silver, OSP,Gold Finger, Peelable Mask, Carbon PrintingMaterialFR4, ROGERS, Taconic, ARLON, BT, Ceramic, Aluminum 12-Layer PCB with Taconic Material