... -based) HDI PCB assembly 2 layer,1.6mm,immersion gold 2 layer,1.6mm,immersion Tin 4layer,1.6mm,immersion gold,plated slot, 4layer,1 ... .6mm,immersion gold,half holegold finger 4layer ... date to leave our facility after ordering is :2 layers : 4 w.d4 layers : 5 w.d6-8 layers : 7 w ...