This is to remove the unwanted copper from the working panel by using chemical etching.
![](https://pcbweller.com/app/uploads/2020/10/PCB-inner-layer-etching-process.jpg)
After the unwanted copper has been removed, the remaining dry film is then to be removed off and leaving behind the copper circuitry that matches the circuit design.
![](https://pcbweller.com/app/uploads/2020/11/PCB-inner-layer-etch-picture.png)
WELLER’s Value:
Advanced automatic control etching production line with high deficiency work from start to end without any manual process.
![](https://pcbweller.com/app/uploads/2020/11/PCB-inner-layer-etch-process.png)