... 3. Short Delivery Time 4. Better After Service immersion gold pcb Our PCB Production Capability for your reference1)Layer:from ... FR4 Halogen Free ,Rogers,Nanya,Emc,HF,Nelcon,Taconic,Al,etc4)Surface finish/treatment:HASL/HASL lead free,HAL,Chemical Gold/tin, ... Immersion Silver/Gold/Tin,OSP,Gold plating,Hard&Soft gold,Plating tin,5)Product range ...