PRETREATMENT METHOD FOR ELECTROLESS PLATING, METHOD FOR MANUFACTURING SUBSTRATE FOR MAGNETIC RECORDING MEDIA INCLUDING THE PRETREATMENT METHOD, AND SUBSTRATE FOR MAGNETIC RECORDING MEDIA MANUFACTURED BY THE MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a pretreatment method for forming a plating film free from flaws on the surface of a plating film formed of nickel and phosphor.;SOLUTION: The pretreatment method is directed at pretreating the first plating film when forming the second plating film including (1) Ni, (2) P and/or B, and (3) arbitrary one or more elements selected among V, Cr, Mn, Fe, Co, Cu, Zn, Mo, Pd, Sn, W and Re, on the substrate having the first plating film formed of Ni and P; includes an etching step of etching the surface of the first plating film on the above substrate by an etching amount in between 1 mg/m² and 5 mg/m²; and thereby controls an oxidized degree of nickel in the surface of the first plating film after having been etched to a value of 0.3 or less. Furthermore, the method for manufacturing the magnetic recording media including the pretreatment method and the magnetic recording media manufactured by the manufacturing method are provided.;COPYRIGHT: (C)2005,JPO&NCIPI