Workpiece with uncoated areas
Workpiece with abnormally thin film thickness or no film
Q1:
Foaming (substrate undergoing electrodeposition with foam on its surface, resulting in uncoated spots as traces of the foam)
Air entrapment
A1:
- Place the workpiece in the bath slowly to avoid foaming.
- Place the workpiece at an angle to facilitate the escaping of the foam.
- Review the solution flow (nozzle) to facilitate the escaping of the foam.
Q2：
Electrical continuity failure (occurrence of workpieces with no film or a very thin film due to defective contact)
A2:
Correct the defective contact. (Inspect the current collector and hanger contacts.)
Q3:
Electrical continuity failure (occurrence of uncoated areas due to the electrically insulating property of adherents on the substrate surface)
A3:
Remove the insulation from the substrate surface