Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

2006-07-25

2006-07-25

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

Reexamination Certificate

active

07081308

ABSTRACT:
In a magnetic recording medium including a substrate (1) having a principal surface on which first and second magnetic layers (5and7) and a spacer layer (6) are at least formed, each of the first and the second magnetic layers being of a ferromagnetic material, the spacer layer being formed between the first and the second magnetic layers for inducing antiferromagnetic exchange interaction between the first and the second magnetic layers, the principal surface of the substrate is provided with concentric textures to have a predetermined surface roughness so that the spacer layer has a uniform thickness. The first magnetic layer is for controlling the antiferromagnetic exchange interaction.

REFERENCES:
patent: 5685958 (1997-11-01), Futamoto et al.
patent: 6537684 (2003-03-01), Doerner et al.
patent: 6582758 (2003-06-01), Sakawaki et al.
patent: 6602612 (2003-08-01), Abarra et al.
patent: 2001-56923 (2001-02-01), None
Machine translation of Masaya et al., JP 2001-056923, Feb. 2001.

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