Patent ID: 8961670
Filing Date: 2015-02-24
Classification: C23C

Abstract:
1. An aqueous, alkaline plating bath composition for electroless deposition of ternary and quaternary cobalt alloys Co-M-P, Co-M-B and Co-M-B—P, wherein M is selected from the group consisting of Mn, Zr, Re, Mo, Ta and W, the plating bath comprising (i) a source of cobalt ions, (ii) a source of M ions, (iii) at least one complexing agent selected from the group consisting of carboxylic acids, hydroxyl carboxylic acids, aminocarboxylic acids and salts of the aforementioned and wherein the concentration of the at least one complexing agent ranges from 0.01 to 0.3 mol/l, (iv) at least one reducing agent selected from the group consisting of hypophosphite ions, borane-based reducing agents, and mixtures thereof, and (v) a stabilising agent according to formula (1):