PCB Technology - Why special treatment for PCB surface?

Let's talk about why we need special treatment for PCB surface.

As copper is easy to oxidise in the air, the oxidised layer of copper has a great impact on soldering. It is easy to form virtual soldering, virtual soldering, resulting in pads and components can not be soldered. Therefore, in the production of PCB manufacturing process, there will be a process, in the pad surface coating (plating) a layer of material to protect the pad from oxidation.

Immersion Gold PCB

At present,PCB surface treatment technology: HASL (hot air levelling), tin plating, silver plating, OSP (antioxidant),ENIG, plating, etc.,of course,in special applications there will be some special PCB surface treatment technology.

Compared with different PCB surface treatment techniques,their costs are different.Of course,the application is also different.Choose only the right one,not the expensive one.Currently there is no perfect PCB surface treatment process for all applications (here is the price/performance ratio,i.e.all PCB applications can be fulfilled at the lowest price).Therefore,there are so many processes for us to choose,of course,each process has its own advantages and disadvantages.What is there is there. The key is to understand them and make the best use of them.