Magnetic recording medium and method of fabricating the same

Details Magnetic recording medium and method of fabricating the same Magnetic recording medium and method of fabricating the same

2007-05-15

2007-05-15

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

Reexamination Certificate

active

10412946

ABSTRACT:
A method of fabricating a low-noise, high-output and large-capacity magnetic recording medium compatible with the AIT3 format in which a metal magnetic film is formed by the vacuum evaporation process under supply of oxygen is disclosed. In the vacuum evaporation process, the running speed of a non-magnetic support is controlled within a range from 150 to 200 m/min, and on thus continuously fast-running, non-magnetic support, a Co magnetic thin film is formed under supply of oxygen so as to achieve a coercive force Hc of the Co magnetic thin film of 100 to 115 kA/m, and a squareness ratio of 0.79 or larger.

REFERENCES:
patent: 5247397 (1993-09-01), Sato et al.
patent: 5851660 (1998-12-01), Tohma et al.
patent: 2001/0003616 (2001-06-01), Onodera et al.

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