| 摘要 |
PURPOSE:To improve the bonding strength of a magnetic layer and the resistance of a magnetic recording medium to curling due to the effect of temp. and humidity by forming a polymer layer having a restricted modulus of tensile elasticity on one side or both sides of a substrate and a thin film of a ferromagnetic body contg. practically no org. high molecular compound on the surface of the polymer layer. CONSTITUTION:A polymer layer having >0.5-20mum thickness and 10-<350kg/ mm.<2> modulus of tensile elasticity is formed on one side or both sides of a substrate having >=350kg/mm.<2> modulus of tensile elasticity, and a thin film of a ferromagnetic body contg. practically no org. high molecular compound is formed on the surface of the polymer layer. The thickness of the polymer layer is half or less of the thickness of the substrate. The polymer layer is made of a vinyl chloride polymer, an acrylic polymer, an acrylate polymer or the like. The ferromagnetic thin film is a thin film type magnetic recording layer or a vertical magnetic recording layer, and it is formed by depositing a magnetic metal such as Fe, Co or Ni or a magnetic metallic compound such as Fe-Co, Fe-Ni or Fe- Co-Ni by plating, vacuum deposition, sputtering, ionic plating or other method. |
