Magnetic recording medium having a thin film magnetic layer form

Details Magnetic recording medium having a thin film magnetic layer form Magnetic recording medium having a thin film magnetic layer form

1989-06-30

1992-01-07

Cashion, Jr., Merrell C.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 65, 428337, 428402, 428695, 428694, 428900, 427129, 427130, 427131, G11B 500

Patent

active

050790625

ABSTRACT:
In a magnetic recording medium in which a thin film of a magnetic material is disposed on a surface of a base of a non-magnetic material directly or through an undercoated film, powder of a material substantially the same as that of the non-magnetic base or an undercoated film is disposed directly beneath the magnetic thin film to form dispersed projections on the surface of the magnetic recording medium. Thus, the product has surface projections, and its magnetic thin film has a generally uniform thickness and uniform magnetic properties.

REFERENCES:
patent: 4514451 (1985-04-01), Suzuki et al.
patent: 4540618 (1985-09-01), Suzuki et al.
patent: 4698251 (1987-10-01), Fukuda et al.
patent: 4778707 (1988-10-01), Arioka et al.
patent: 4880687 (1989-11-01), Yokoyama et al.

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