Magnetic recording medium and method for producing the same

Details Magnetic recording medium and method for producing the same Magnetic recording medium and method for producing the same

1993-10-12

1995-12-12

Beck, Shrive

Coating processes

Direct application of electrical, magnetic, wave, or...

Pretreatment of substrate or post-treatment of coated substrate

427548, 427599, 427130, B05D 300

Patent

active

054748143

ABSTRACT:
A magnetic recording medium which is optimum for high-density recording in which not only orientation of magnetic particles to the direction of thickness of a magnetic layer can be performed effectively but the orientation is maintained, and a method for producing such a magnetic recording medium. The method includes the steps of multiply applying a lower layer containing inorganic powder and resin, an intermediate layer containing resin and an upper layer as a magnetic layer containing needle-shaped ferromagnetic powder onto a non-magnetic support in the condition where all the layers are wet, and drying and solidifying the layers while the ferromagnetic powder contained in the upper layer is oriented at a predetermined angle with respect to the direction of thickness of the intermediate layer. In an another embodiment, only two layers are applied to the support including a non-magnetic layer and a magnetic layer.

REFERENCES:
patent: 4447467 (1984-05-01), Oguchi et al.
patent: 5034243 (1991-07-01), Chiba et al.
patent: 5258223 (1993-11-01), Inaba et al.
patent: 5336559 (1994-08-01), Yamagishi et al.

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