China wholesale printed circuit board manufacturer Double Sided PCB
We can always satisfy our respected customers with our good quality, good price and good service due to we are more professional and more hard-working and do it in cost-effective way for China wholesale printed circuit board manufacturer Double Sided PCB, Our items have exported to North America, Europe, Japan, Korea, Australia, New Zealand, Russia and other countries. Wanting forward to build up a very good and long-term cooperation along with you in coming long run!
We can always satisfy our respected customers with our good quality, good price and good service due to we are more professional and more hard-working and do it in cost-effective way for , With the intensified strength and more reliable credit, we have been here to serve our customers by providing the highest quality and service, and we sincerely appreciate your support. We’ll endeavor to maintain our great reputation as the best merchandise supplier in the world. If you have any questions or comments, please contact with us freely.
Immersion Gold is the method of chemical deposition, through the chemical REDOX reaction to generate a layer of coating which is generally thick, is a chemical nickel gold layer deposition method, can achieve a thicker gold layer.
The process of Immersion Gold on the surface of printed circuit is characterized by stable color, good brightness, smooth coating and good weld ability. Basically, it can be divided into four stages: pre-treatment (oil removal, micro-corrosion, activation and leaching), nickel precipitation, gold precipitation, post-treatment (waste gold water washing,DI washing, drying), gold precipitation thickness between 0.025-0.1um.
Gold used in the surface treatment of circuit boards, because of its strong electrical conductivity, good oxidation resistance, long life, general applications such as keypad, gold finger board.