Cyanide-free electrolytic silver stripper
The Umicore Silver Stripper 638 is used for anodic removal (stripping) of silver layers.
It is mainly used for stripping back flash silver layers on electronic products, for selective spot coating in the mask process of continuous lines. However, the electrolyte is also well suited for removing thicker silver layers.
There is hardly any attack on the base material (copper or nickel). The electrolyte has a high absorption capacity and exposed copper shows no discoloration.
Thanks to improved lifetime, the number of new make-ups is reduced and additionally the stripper is convincing with low working temperature.
Electrolyte characteristics
Electrolyte type cyanide-free, anodic
pH value approx. 10.5
Operating temperature RT 20 - 30 °C
Current density range 1 - 3 A/dm² (anodic)
Stripping speed approx. 1.2 μm/min at 2 A/dm², approx. 1.8 μm/min at 3 A/dm²
Advantages
Cyanide-free
Improved lifetime
Minimal attack on the base material
Low working temperature
High absorption capacity
Applications
Anodic stripping of silver layers
