Patent ID: 8012251
Filing Date: 2011-09-06
Classification: C23C

Abstract:
1. An electroless plating bath for forming a Ni—Re—B alloy, containing not less than 50 at % of Re, on a substrate by electroless plating, said bath having a pH of 6 to 8 and comprising a metal supply source component containing Ni 2+ and ReO 4 − at an equal equivalent in the range of 0.01 to 0.5 mol/L, a complexing agent component containing citric acid and at least one other organic acid, the molar concentration ratio of citric acid to the sum of Ni 2+ and ReO 4 − being 1/20 to 1/5 and the molar concentration ratio of the total organic acid of said citric acid and said at least one other organic acid to the sum of Ni 2+ and ReO 4 − being 1/2 to 10, and a reducing agent component containing dimethylamine-borane, the molar concentration ratio of dimethylamine-borane to the sum of Ni 2+ and ReO4 − being 1/4 to 2.