ENIG, chemical nickel gold.
1, the surface is flat (relative to spray tin, etc.);
2, solderable, can be wire (gold wire, aluminum wire), good heat dissipation;
3, storage for a long time (vacuum packaging more than 1 year);
4, SMT process resistant to multiple reflow, can be repeated many times.
5, common nickel plate thickness 120-200u ", thick 1-5u"; Niu Jinbang Dingbang gold plate general gold thick 10u "above, nickel thickness 150u" above
Role: Used to prevent copper on the surface of the circuit board is oxidized or corroded. And for welding and applied to contact