Ruthenium Alloy Layer and Its Layer Combinations
AssigneeUmicore Galvanotechnik GmbH
InventorsSascha Berger, Klaus Bronder, Uwe Manz, Martin Pohl, Martin Stegmaier, Matthias Wahl
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Abstract
Aqueous electrolyte for deposition of a ruthenium alloy layer on metal surfaces, in particular base metal surfaces, its use and a corresponding electrolytic process, and a correspondingly produced layer sequence.
Claims16
1-15. (canceled)
An aqueous electrolyte for deposition of ruthenium alloys on metal surfaces, in particular base metal surfaces, comprising:
- a) ruthenium as a bicyclic, anionic ruthenium nitrido complex compound of the formula [Ru2N(H2O)2X8]3−, wherein X is one or more singly or multiply negatively charged counterions, at a concentration of 0.5-20 g/l based on ruthenium as metal;
- b) one or more alloy metals dissolved in ionic form and selected from the group consisting of:
- Cu, W, Fe, Co, Ni, In, Zn, Sn, Pd, and Pt, each at a concentration of 0.1-10 g/l based on the metal;
- c) one or more anions of a di-, tri-, or tetracarboxylic acid at a concentration of 0.05-2 mol per liter;
- d) one or more anionic surfactants at a concentration of 0.1-500 mg/1;
- wherein the electrolyte has a pH value of 5.0 to 10.0.
A method for producing an article having a metal surface and an alloy metal layer thereon, which comprises electrolytically depositing the alloy metal layer on the metal surface using the aqueous electrolyte according to claim 1.
Dependencies are inferred from the claim text.