MAGNETIC RECORDING MEDIUM

摘要

PURPOSE:To obtain a magnetic recording medium which is not magnetized at all even under high-temp. heating in the stage of forming a magnetic film and has excellent characteristics by forming a film consisting of Ni-Cu-P contg. Cu within a specific range onto a non-magnetic substrate and forming the magnetic film on the film. CONSTITUTION:The electroless plating film consisting of Ni-Cu-P contg. 20- 65wt% Cu is formed on the non-magnetic substrate which is an Al sheet, etc. The film has no magnetism at all even after one hour of heat treatment at 400 deg.C. The Ni-Cu-P film is therefore not magnetized at all even if the magnetic film is formed thereon by a sputtering method at >=200 deg.C, more particularly >=300 deg.C. The magnetic recording medium is thus provided with the satisfactory electromagnetic converting characteristic.