Stock material or miscellaneous articles – Circular sheet or circular blank – Recording medium or carrier
Patent
1997-04-22
1999-11-02
Resan, Stevan A.
Stock material or miscellaneous articles
Circular sheet or circular blank
Recording medium or carrier
428336, 428694BH, 428694BS, 428900, G11B 5706
Patent
active
059766603
ABSTRACT:
A magnetic recording medium comprising a non-magnetic support having a substantially non-magnetic undercoating layer on the non-magnetic support and a magnetic layer comprising a ferromagnetic hexagonal ferrite fine powder dispersed in a binder on the undercoating layer in this order, wherein the squareness ratio of the magnetic layer in the perpendicular direction is at least 0.4, the coercive force of the magnetic layer in the perpendicular direction is at least 1,500 Oe, and between the bit minimum inversion interval Y .mu.m and the maximum inversion interval Z .mu.m of the digital signal to be recorded and the thickness X .mu.m of the magnetic layer, there are the relations;
REFERENCES:
patent: 5384175 (1995-01-01), Kojima et al.
patent: 5512363 (1996-04-01), Goto et al.
patent: 5549955 (1996-08-01), Kawamata et al.
patent: 5597638 (1997-01-01), Saito et al.
patent: 5645917 (1997-07-01), Ejiri et al.
Saito Shinji
Yamazaki Nobuo
Fuji Photo Film Co. , Ltd.
Resan Stevan A.
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