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

2007-07-10

2007-07-10

Bashore, Alain L. (Department: 1762)

Coating processes

Magnetic base or coating

Magnetic coating

C427S248100, C427S127000, C427S131000, C428S836100

Reexamination Certificate

active

10885340

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.

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patent: 5326637 (1994-07-01), Nasu et al.
patent: 5851660 (1998-12-01), Tohma et al.
patent: 6773745 (2004-08-01), Arisaka et al.

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