Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

2007-12-04

2007-12-04

Rickman, Holly (Department: 1773)

Stock material or miscellaneous articles

Magnetic recording component or stock

Thin film media

Reexamination Certificate

active

10839511

ABSTRACT:
There is provided a magnetic recording medium having an extremely thin magnetic layer, in which, not only corrosion of the magnetic layer is suppressed, but also the storage properties and the electromagnetic conversion properties are improved. The magnetic recording medium comprises: an elongated nonmagnetic substrate; a first shielding layer comprised of a metal or an alloy; a second shielding layer comprised of a material which is more hardly oxidized than the first shielding layer, and a magnetic layer, formed by a vacuum thin film formation technique, having a thickness of 55 nm or less. A total thickness of the first shielding layer and the second shielding layer is 2 to 50 nm.

REFERENCES:
patent: 04-335206 (1992-11-01), None
patent: 2003-016617 (2003-01-01), None
Machine translation of JP05-020662, Jan. 1993, Japan.
English abstract JP04-335206, Nov. 1992, Japan.
England abstract JP 01-124115, May 1989, Japan.
English translation of JP 04-335206, Kunihiro Ueda, Nov. 1992.
Japanese Office Action issued on Mar. 13, 2007.

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