MANUFACTURE OF MAGNETIC RECORDING MEDIUM

摘要

PURPOSE:To obtain a lot of magnetic recording media with less short wavelength output fluctuation by specifying an angle between an axis in the crystal flowing direction of a columnar structure and the incident direction of a lubricant vapor in forming a lubricant layer onto a ferromagnetic metallic thin film comprising the columnar structure where a part of a constituting element is segregated on the surface. CONSTITUTION:A film 8 formed with the columnar structure on the substrate is moved from a supply shaft 9 to a winding shaft 10. An evaporation source 11 of a lubricant consists of a tank 12 and the evaporation lubricant 13 and any known heating source is used. The lubricant vapor flow 14 passes through an open hole 16 of a part of a mask 15 and goes to the moving film. The condition in this case is limited by applying lubrication evaporation on the condition that an axis g1 in the incident direction of a crystal of the columnar structure 5 (the g1 has an angle (a) with a perpendicular line to the substrate in this case) and the incident angle l1 of the vapor flow 14 have an angle of >=30 deg. (no upper limit is given clearly but up to 90 deg. preferably, and the effect is unstable with a more angle). The critical significance of >=30 deg. is given because the practical level permitting the output fluctuation is + or -1dB.