主权项 |
1. A method for deposition of a matte copper coating comprising, in this order, the steps
a. providing a substrate, b. depositing a first copper layer onto the substrate from a first aqueous electrolyte comprising a source of copper ions, at least one acid and at least one polyether compound wherein said first electrolyte does not contain an organic compound comprising divalent sulfur and c. depositing a second copper layer onto the first copper layer from a second aqueous electrolyte comprising a source of copper ions, at least one acid, a first water soluble sulfur-containing additive selected from the group consisting of alkyl sulfonic acid derivatives and a second water soluble sulfur containing additive selected from the group consisting of aromatic sulfonic acid derivativeswherein a current density is applied to the substrate during steps b and c. |