Welcome to Well-Tech - one of the leading manufacturers and suppliers of PCB products in China. Our factory is engaged in PCB manufacturing and offering customized gold immersion au2u'' pcb 6 layers with fr4 high tg material at competitive price. High reliability, strong diversity and expert advice are our characteristics. Please contact us if you have inquiry.
ENIG (Immersion Ni/Au): Electroless deposition of nickel on copper and Gold on nickel, Au is between 1u’’ to 5u’’ . Finishing is Lead Free and with RoHS compliant. Excellent flatness, it gives better result for assembly. Storage up to two years, the longer shelf life or useful life of the circuits. But it exist the risk of black pad,and the cost is a little expensive than other finish.
Material /Laminate: FR4 TG170
Board thickness: 2.0mm
Copper weight: 2/1/1/1/1/2oz
The affect of surface treatment on soldering as below,