Experiments were conducted to study the relations between concentration and brightness range, current efficiency, or throwing power, etc. in potassium cyanide baths for high-speed and high-efficiency copper plating.
The comparison of the above data was made between potassium and sodium cyanide baths.
As the results, the plating in potassium cyanide bath was superior to that in sodium cyanide on brightness range, current efficiency, and throwing power. Accordingly, potassium cyanide bath is preferable to high-speed and high-efficiency plating.
No significant differences were observed between the both baths on hardness and stress.