Magnetic recording disk and process for manufacture thereof

A process for manufacturing a magnetic recording disk, which comprises forming a magnetic layer on a substrate, forming a protective layer on the magnetic layer and forming a lubricant layer on the protective layer, the method comprising forming the lubricant layer from a lubricant containing a perfluoropolyether compound having an end moiety containing a phosphazene ring and a perfluoropolyether compound having an end moiety containing a hydroxyl group.

A magnetic recording disk comprising a substrate, a magnetic layer formed on the substrate, a protective layer formed on the magnetic layer and a lubricant layer formed on the protective layer, the lubricant layer containing a perfluoropolyether compound having an end moiety containing a hydroxyl group on the protective layer side and containing a perfluoropolyether compound having an end moiety containing a phosphazene ring on the other surface side.

A process for manufacturing a magnetic recording disk, which comprises forming a magnetic layer on a substrate, forming a protective layer on the magnetic layer and forming a lubricant layer on the protective layer, the method comprising forming a layer from a lubricant containing a perfluoropolyether compound having an end moiety containing a hydroxyl group and then forming a layer from a perfluoropolyether compound having an end moiety containing a phosphazene ring to form the lubricant layer.