Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1992-09-08

1993-10-05

Thibodeau, Paul J.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428336, 428694, 428900, 428663, 427130, 427131, G11B 566, B32B 302

Patent

active

052503399

ABSTRACT:
A magnetic recording medium suitable for high-density recording which comprises a non-magnetic substrate disk, at least one magnetic layer and at least one protective layer, the magnetic layer and the protective layer being formed in succession on the non-magnetic substrate disk, wherein the non-magnetic substrate disk comprises a glass substrate and at least one non-magnetic metallic film provided on the glass substrate, and the non-magnetic metallic film is provided on a surface thereof with a multitude of fine concentric grooves.

REFERENCES:
patent: 4698251 (1987-10-01), Fukuda et al.
patent: 4725470 (1988-02-01), Katsuki
patent: 4735840 (1988-04-01), Hedgcoth
patent: 4876117 (1989-10-01), Bornstein
patent: 4973496 (1990-11-01), Kruger et al.
Patents Abstracts of Japan, vol. 13, No. 91 (P837), Mar. 3, 1989, (for Japanese Patent Publication No. 63 273 208).
Seagle et al, Journal of Applied Physics, vol. 61, No. 15, Apr. 15, 1987, pp. 4025-4027.

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