| 摘要 |
Disclosed is a magnetic recording medium having a magnetic layer directly formed on at least one surface of a base film that comprises, as the essential ingredient, an aromatic polyamide, in which the number of protrusions having a height of at least 10 nm on the surface of the magnetic layer, Na(10) (/mm2), the number of protrusions having a height of at least 50 nm thereon, Na(50) (/mm2), and the number of protrusions having a height of at least 10 nm on the surface of the base film coated with the magnetic layer, Na(10)' (/mm2), all satisfy the following formulae:The medium has, as the non-magnetic substrate (base film), a highly-tough, aromatic polyamide film, and the surface profile of its magnetic layer and that of its base film are specifically controlled.
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