Magnetic recording medium and manufacturing method thereof

Details Magnetic recording medium and manufacturing method thereof Magnetic recording medium and manufacturing method thereof

1994-01-14

1996-03-05

Kiliman, Leszek

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Physical dimension specified

428336, 428611, 428615, 428655, 428666, 428667, 428694T, 428694TS, 428694TP, 428900, 428928, B32B 516, B32B 1500, G11B 566

Patent

active

054966329

ABSTRACT:
A magnetic recording medium capable of making a high-density recording, with improved magnetic characteristics such as coercive force (Hc) and other factors, in which the flatness of the surface of a magnetic recording medium is maintained, and a method for the manufacture thereof are disclosed; by disposing a non-magnetic metal buffer layer 6 between a non-magnetic glass substrate 1 and a non-magnetic metal under layer 2 and keeping a ratio d.sub.1 /d.sub.2 of the half bandwidth of an X-ray diffraction peak of the metal buffer layer 6 and the metal under layer 2 predetermined values, a large increase in coercive force (Hc) can be obtained; in addition, by controlling the film thickness .delta. of the metal buffer layer 6 and the base substance temperature (T) when the metal buffer layer 6 is formed, magnetic characteristics such as squareness (S), coercive force squareness (S*), coercive force difference (.sub..DELTA. HC) and coercive force squareness difference (.sub..DELTA. S*) can be improved.

REFERENCES:
patent: 5098733 (1992-03-01), Kyogoku et al.
patent: 5298324 (1994-03-01), Ivett
patent: 5316844 (1994-03-01), Suzuki
patent: 5324593 (1994-06-01), Lal
patent: 5344706 (1994-09-01), Lambeth
patent: 5352501 (1994-10-01), Miyamoto
patent: 5372843 (1994-12-01), Miyamura

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