| 摘要 |
PURPOSE:To improve coercive force and to improve substantially corrosion resistance by forming a thin ferromagnetic metallic film of which the compsn. ratio of cobalt and chromium is 5-20wt% by the weight of the chromium and which has diagonally the axis of easy magnetization on a substrate. CONSTITUTION:The cobalt 8 and chromium 9 of an evaporating source 7 for a ferromagnetic material are heated to evaporate in a vacuum deposition device and the vapor thereof is made incident diagonally by vapor deposition to the substrate 4 consisting of a polyester film, etc. via a sticking preventive plate 10, by which the thin ferromagnetic metallic film layer having the axis of easy magnetization in the diagonal direction is formed on the substrate 4. The output of an electric power source for heating the cobalt 8 and chromium 9 is adjusted to adjust the composition ratio of the cobalt and chromium so as to attain 5-20wt% by the weight of the chromium. The coercive force of the thin metallic layer is thereby increased and the magnetic characteristic is improved; in addition the corrosion resistance is thoroughly improved.
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