Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1988-01-28

1989-05-23

Thibodeau, Paul J.

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

427131, 427132, 428611, 428686, 428694, 428900, G11B 564

Patent

active

048330205

ABSTRACT:
In a magnetic recording medium including an underlayer and a magnetic layer formed sequentially on a substrate, the underlayer is composed of a composite underlayer having an at least two-layered structure, the underlayer on the side of the substrate is made of a material providing low modulation to the magnetic recording medium while the underlayer on the side of the magnetic layer is made of a material providing a high S/N ratio to the medium. This makes it possible to obtain a magnetic recording medium having low modulation and high S/N ratio.

REFERENCES:
patent: 3150939 (1964-09-01), Wenner
patent: 4544591 (1985-10-01), Uesaka et al.
patent: 4610911 (1986-09-01), Opfer et al.
patent: 4652499 (1987-03-01), Howard
patent: 4743491 (1988-05-01), Asada et al.

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