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 Tin,Impedance Controlled,Vias Plugged with Solder Mask,RoHS Compliance. ... PrintingMaterialFR4, ROGERS, Taconic, ARLON, BT, Ceramic, Aluminum 12-Layer PCB with Taconic Material