Magnetic recording medium and method of producing same

Details Magnetic recording medium and method of producing same Magnetic recording medium and method of producing same

1989-05-23

1990-08-21

Zimmerman, John J.

Stock material or miscellaneous articles

All metal or with adjacent metals

Having magnetic properties, or preformed fiber orientation...

428634, 428636, 428666, 428668, 428678, 428928, 2041922, G11B 566, G11B 584, C23C 1414, C23C 1434

Patent

active

049505483

ABSTRACT:
The present invention relates to a magnetic recording medium for a magnetic disk unit or the like and, more particularly, to a magnetic recording medium having its recording layer made of a magnetic alloy film with uniform magnetic characteristics. The present magnetic recording medium comprises a non-magnetic substrate, at least two sputtered layers of chromium thin film having a bow-like columnar structure which chromium thin film is laminated on the substrate, another sputtered layer of a magnetic alloy thin film laminated on the chromium thin film, and a protective layer laminated on the magnetic alloy thin film. The present invention is effective in reducing modulation of regenerative output relatively independent of a texture roughness of the substrate.

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Ishikawa, M., "Film Structure and Magnetic Properties of CoNiCr/Cr Sputtered Thin Film", IEEE Transactions on Magnetics, vol. Mag-22, No. 5, Sep. 1988, pp. 573-575.
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