Patent ID: 7641783
Filing Date: 2010-01-05
Classification: C25D,G11B,H01F

Abstract:
1. A solution comprising ionic Fe supplied to the solution by an iron salt, ionic Pt supplied to the solution by a hexachloroplatinate(IV) salt, at a molar ratio of the ionic Fe to the ionic Pt ranging from 0.75 to 3, tartaric acid as a complexing agent, and chloride ion in an amount in excess of any chloride ion supplied to the solution by the iron salt and the hexachloroplatinate(IV) salt, wherein the solution is such that it is capable of depositing FePt or FePtCu when plating using the solution is performed, wherein a concentration of the ionic Fe is from 0.01 mol/L to 0.05 mol/L, wherein a pH of the solution is from 7.0 to 9.0, and wherein the chloride ion concentration is not lower than a molar concentration of the hexachloroplatinate(IV) salt.