... Solder Mask, HASL, Impedance Controlled, Vias Plugged with Solder Mask. 4-Layer PCB,Gold Finger,Red Solder Mask,HASL,Impedance ... Controlled,Vias Plugged with Solder Mask. ... including warp & twist check) Dimensional Inspection (finished hole sizes, pcb profiles, etc) MicrosectionSolderability Test (245±5ºC; 3-5 ...