MAGNETIC RECORDING MEDIUM

• Main Authors: TADA JUNYA, YAMANOBE YASUNARI
• Format: Patent
• Language: English
• Published: 05.03.1993
• Subjects: INFORMATION STORAGE; INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER; PHYSICS

PURPOSE:To provide the magnetic recording medium having the excellent wear resistance of a protective film and corrosion resistance of a magnetic recording layer. CONSTITUTION:The main parts of the recording medium are constituted of a substrate 1 consisting of an aluminum alloy, a hardening treated film 2 consisting of an Ni-P alloy, the magnetic recording layer 3 consisting of Co-Ni- Cr, and the protective film 4 consisting of a compsn. expressed by TaxZr1-xOy (where 0.6<=x<1.1, 5<=y<0.5x+2). A lubricating layer 5 is formed on this protective film 4. The TaxZr1-xOy constituting the protective film 3 is high in hardness but is not brittle and has the extremely low film stress, has the high adhesive power to the magnetic recording layer and the good absortivity of a lubricant and can, therefore, form a uniform lubricating layer on the surface of the protective film, thereby decreasing the coefft. of friction. Since this material has the excellent surface lubricity, stability of the film surface and inside with lapse of time and moisture resistance, low wettability with water and low adsorptivity of moisture, the corrosion resistance of the magnetic recording layer is exceedingly improved coupled with the improved wear resistance of the protective film.