Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1994-07-08

1996-08-13

Kiliman, Leszek

Stock material or miscellaneous articles

Structurally defined web or sheet

Continuous and nonuniform or irregular surface on layer or...

428212, 428323, 428336, 428694B, 428694BR, 428694BG, 428694BA, 428694BH, 428694BM, 428900, B32B 310, B32B 702, B32B 516, G11B 566

Patent

active

055454623

ABSTRACT:
Disclosed is a magnetic recording medium characterized in that plural magnetic layers are provided on a non-magnetic support, the uppermost layer of the magnetic layers contains a ferromagnetic metallic powder and/or a hexagonal system magnetic powder and a binder, at least one layer other than the uppermost layer contains Co-containing iron oxide and a binder, the film thickness of the uppermost layer is 0.5 .mu.m or less, and the surface of the uppermost layer of the magnetic layers has an R.sub.10z value of the magnetic layer defined below of 50 nm or less, by which electromagnetic conversion characteristics of a magnetic recording medium can be improved.

REFERENCES:
patent: 4720411 (1988-01-01), Shimozawa et al.
patent: 4743487 (1988-05-01), Saito et al.
patent: 4911951 (1990-03-01), Ogawa et al.
patent: 5051292 (1991-09-01), Katoh et al.
patent: 5063105 (1991-11-01), Ryoke et al.
patent: 5066534 (1991-11-01), Goto et al.
Patent Abstracts of Japan vol. 14, No. 512 (P-112); Nov. 9, 1990 JPA-2-214,019; Aug. 27, 1990.
Patent Abstracts of Japan vol. 15, No. 041 (P-116); Jan. 31, 1991, JPA-2-276,020.

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