... , Impedance Controlled, Vias Plugged with Solder Mask, RoHS Compliance. 12-Layer PCB,Taconic Material,2.0mm Thickness,Immersion Tin,Impedance Controlled ... hole sizes, pcb profiles, etc) MicrosectionSolderability Test (245±5ºC; 3-5 sec) Thermal Test (288±5ºC; 10 sec. inspect ... Mask, Carbon PrintingMaterialFR4, ROGERS, Taconic, ARLON, BT, Ceramic, Aluminum 12-Layer PCB with Taconic Material