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US 4,575,475 AGranted
Magnetic recording medium
AssigneeTDK Corporation
InventorsMasatoshi Nakayama, Haruyuki Morita, Yuichi Kubota, Keiko Tsuchiya
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Abstract
In a magnetic recording medium comprising a plastic base film and a magnetic layer formed thereon, the base film is plasma treated at frequencies in the range of 10 kHz to 200 kHz in an inorganic gas such as argon and nitrogen and preferably, in an inorganic gas containing at least 5% of oxygen.
Claims11
A magnetic recording medium comprising a base film and a magnetic layer formed thereon, the base film being plasma treated at a frequency in the range of 10 to 200 kilohertz in an atmosphere consisting essentially of an inorganic gas and 5-100% oxygen by volume.
Dependencies are inferred from the claim text.