Perpendicular magnetic recording medium

Details Perpendicular magnetic recording medium Perpendicular magnetic recording medium

1988-09-19

1990-05-08

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of metal

427129, 428460, 4284735, 4284744, G11B 564

Patent

active

049237632

ABSTRACT:
There are disclosed a perpendicular magnetic recording medium comprising a substrate of a polymer film containing 0.7% by weight or less of a residual solvent and a ferromagnetic alloy layer formed on the substrate and a method for preparing the same comprising the steps of heating a substrate composed of a polymer film containing a residual solvent in order to regulate a content of the solvent existing in the substrate to 0.7% by weight or less; and afterward forming a magnetic layer composed of a ferromagnetic alloy on the substrate.
The perpendicular magnetic recording medium of the present invention has a prolonged durability and heightened reliability.

REFERENCES:
patent: 4489124 (1984-12-01), Watanabe
patent: 4508782 (1985-04-01), Miura et al.
patent: 4533603 (1985-08-01), Fukuda et al.
patent: 4568598 (1986-02-01), Bilkadi et al.
patent: 4575475 (1986-03-01), Nakayama et al.
patent: 4661377 (1987-04-01), Morita et al.
"Patent Abstracts of Japan", vol. 7, No. 127 (P-201)[1272], Jun. 3, 1983.

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