Various of PCB surface finishes are used to coat the exposed copper areas. This is to enable protection of the surface and good solderability.
![](https://pcbweller.com/app/uploads/2020/11/PCB-surface-finishes.png)
The various of finishes can include Electroless Nickel Immersion Gold, HASL, Immersion Silver,ENEPIG etc.
![](https://pcbweller.com/app/uploads/2020/11/PCB-surface-finish-process.png)
Thicknesses and solderability tests are always carried out.
![](https://pcbweller.com/app/uploads/2020/11/PCB-Surface-finishing.png)
Commonly available PCB surface finishes in Weller (all in house)
![](https://pcbweller.com/app/uploads/2020/11/PCB-surface-finish-chart.png)