12-Layer PCB with Taconic Material, Immersion Tin, Impedance Controlled, Vias Plugged with Solder Mask, RoHS Compliance. 12-Layer PCB,Taconic Material,2 ... mmPeel Strength1.4N/mmSolder Mask Abrasion>= 6HFlammability94V-0Surface FinishingHASL, LF-HASL, ENIG, Flash Gold, Immersion Tin, Immersion Silver, OSP, ... , ROGERS, Taconic, ARLON, BT, Ceramic, Aluminum 12-Layer PCB with Taconic Material