Shenzhen Custom Printed Circuit Board Electronic PCBA EMS

There are several treatment processes for the surface of the circuit board:  light board (no treatment on the surface),rosin board, OSP (organic solder protectant, slightly better than rosin),tin spray (with lead tin, lead-free tin),gold-plated board,ENIG surface finished, Shen Jinban, etc., these are more perceptible. The difference between gold plating and immersion gold process. Immersion gold adopts the method of chemical deposition. A layer of coating is formed by chemical redox reaction. Generally, the thickness is thicker. Gold plating uses the principle of electrolysis, also known as electroplating. Most other metal surface treatments are also electroplated. In actual product applications, 90% of gold plates are immersion gold plates, because the poor weldability of gold-plated plates is his fatal shortcoming, and it is also the direct reason why many companies give up the gold-plating process! The immersion gold process deposits a nickel-gold coating with sta…

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