Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1982-11-04

1987-04-28

Pianalto, Bernard D.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having composition, density, or hardness gradient

428336, 428611, 428637, 428639, 428693, 428702, 428900, 428928, H01F 1002

Patent

active

046614184

ABSTRACT:
A magnetic recording medium comprising a magnetic recording layer formed on a non-magnetic substrate by depositing a ferromagnetic metal or alloy on the substrate, the recording layer containing oxygen atoms in such a manner that the ratio thereof gradually reduces from the substrate side to the surface of the recording layer except the portion thereof very near to the surface thereof. The recording layer may comprise many deposited magnetic films, each containing oxygen atoms distributed as described above or uniformly in a ratio different from those in the other magnetic films. In the latter case, a magnetic film positioned nearer to the substrate contains a higher ratio of oxygen atoms.

REFERENCES:
patent: 4239835 (1980-12-01), Iijima et al.

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