... . Short Delivery Time 4. Better After Service immersion gold pcb Our PCB Production Capability for your reference1)Layer:from 1 to 202 ... ,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:Flex-PCB,Rigid-PCB,Flex-rigid PCB,HDI PCB ,PCB of single,Double and Multi-layers,High frequency ...