... OSP processing/immersion Tin /immersion silerLayerssingle-sided,double-sided,multilayer pcb boardMin trace width6milMin space width3milMin trace to pad ... diameter8milMin via pad24milMax board sizeSingle and double sides:550mmX1100mm;multilayer:550mmX640mmMin solder mask dam6milMin solder mask clearance1.5milMin solder ... resistance testing, gold slice up, Solder ability. Electronic Multilayer PCB Board