MAGNETIC RECORDING MEDIUM
PURPOSE:To obtain the titled recording medium having excellent rust resistance, etc. by vapor-depositing a magnetic metallic material on the surface of a moving substrate in the form of a bent inclined column while changing the incident angle continuously from a high to a low incident angle, and vap...
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Format: | Patent |
Sprache: | eng |
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Zusammenfassung: | PURPOSE:To obtain the titled recording medium having excellent rust resistance, etc. by vapor-depositing a magnetic metallic material on the surface of a moving substrate in the form of a bent inclined column while changing the incident angle continuously from a high to a low incident angle, and vapor-depositing a nonmagnetic material on said vapor-deposited film while changing the incident angle continuously from a high to a low incident angle. CONSTITUTION:A metal such as Fe, Co, Ni, or an alloy of said metals is vapor-deposited from a crucible 23 on a nonmagnetic strip-shaped substrate 21 of polyester, etc. to form an inclined columnar magnetic layer 2 on the substrate 1(21) while transporting the substrate 21 along a cooling can 22 in the direction as shown by the arrow A, changing the incident angle continuously from a high incident angle such as 90 deg. to a low incident angle of 25 deg., and controlling the vapor flow with deposition preventive plates 27 and 28. Then >=1 kind of nonmagnetic metallic material selected from Cr, Ti, Sn, Cu, and Al from a crucible 25 is vapor-deposited on the layer 2 to form a film 3 while reversely winding and transporting the substrate 21 in the direction as shown by the arrow B and again transporting the substrate in the direction as shown by the arrow A, and changing the vapor flow continuously from a high to a low incident angle with deposition preventive plates 28 and 29. The magnetic recording medium having excellent rust resistance and less curls is obtained in this way. |
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