The (ENIG) coating without electroplating nickel and gold has been successfully applied in many circuit boards. Although it has a high unit cost, it has a flat surface and excellent solderability.
Advantages: good solderability, flat surface, long storage life, can withstand multiple reflux welding.
Disadvantages: high cost (about five times as much as HASL), "black block" problem, manufacturing process using some harmful chemicals.
Immersion Silver is a newly added method for surface treatment of PCB. Mainly used in Asia, it is being promoted in North America and Europe. During welding, the silver layer melts into the weld joint, leaving a tin / lead / silver alloy on the copper layer, which provides a very reliable welding point for BGA packaging. Its contrast color makes it easy to detect, and it is also a natural alternative to HASL for welding treatment.(Pcb Online)
Process of pcb manufacturing:
PCB Factory Show
Our Company is UL,ISO9001,ROHS and GJB9001B certified.
Packing and Shipping:
1. How to Get a quotation?
For PCBs,pls send us the Gerber File.For PCBA,pls send us the Gerber file and BOM(Bill of Materials)
2. What is the MOQ?
No MOQ.1 pcs is ok.
3.What is the lead time?
For PCB orders,the lead time is 2 to 10 days.For PCBA orders,the lead time will be 15 to 30 days.
4.Will the boards be tested before shippment?
Yes,all PCBs will be tested by Flying Probe or E-test.For PCBA,we will have AOI,X-ray,and functional test