| abstract |
A method of forming copper oxide on a copper surface, the method comprising the steps of: a) providing a substrate comprising the copper surface, b) optionally pre-cleaning the copper surface, c) aligning the copper surface with An alkaline aqueous oxidizing solution is contacted to form the copper oxide on the copper surface, the alkaline aqueous oxidizing solution comprising one or more than one oxidizing compound selected from the group consisting of: - aromatic sulfonic acid Compounds, salts thereof, -aromatic sulfonate compounds, salts thereof, -aromatic nitro compounds and salts thereof. |