Patent ID: 7476305

Claim:
An electrolytic system comprising: an electroplating bath containing a platinum electroplating solution for electroplating a semiconductor wafer; an electrical circuit for applying an electrical current with a current density of less than 5 mA/cm 2 and an electrical potential across said platinum electroplating solution, said electrical circuit including an electrode, said electrical potential generating Pt +2 ions in said platinum electroplating solution; an oxidizing unit with a peroxide solution at a temperature of about 60 C to about 80 C, said oxidizing unit being configured to receive about 10% to about 15% of said platinum electroplating solution and to decrease a concentration of said Pt +2 ions of said platinum electroplating solution, said oxidizing unit being part of a closed loop recirculation system for platinum; and a conduit for connecting said oxidizing unit to said electroplating bath.