[ Date Time : 2015-10-10 ] [ Comments : 0
The advantages and disadvantages of PCB surface coating
A ： Electrolytic Ni/Au 〔The coating is the most stable, but the price is the highest.〕
B ：Immersiog AG 〔The performance is not as good as the gold plating coating, easy to lead to leakage of electricity〕
C ：ElectrolessNickel?ImmersionAu，ENIG 〔 When the gold process is not stable, easy to produce black plate.〕
D ：Electroless Tin 〔 No lead tin leaching has not yet fully mature〕
E ：Sn/Ag/CuHASL 〔The production process of the coating is not yet fully mature. 〕
F ：OSP，OrganicSolderabilityPreservations 〔This kind of coating the cheapest, but the worst performance.Should pay attention to when using the OSP board, two come back between welding and welding between the wave soldering and storage time of the board, because after high temperature heating board welding plate protective film is damaged, weldability will be greatly reduced. 〕
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