... 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. ... Resistance1E+12Ω(Normal) Thermal Shock 3x10Sec@288 Centigrade DegreeWarp and Twist<= 0.7%Electric Strength> 1.3KV/mmPeel ...