Magnetic disc

Details Magnetic disc Magnetic disc

1993-02-04

1995-02-28

Resan, Stevan A.

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428156, 428323, 428336, 428694B, 428694BR, 428900, 427130, G11B 500

Patent

active

053935845

ABSTRACT:
When a magnetic disc is fabricated by forming on a rigid substrate a film of a magnetic coating material containing magnetic fine particles and a binder, and orienting and curing the film, the film is formed while a magnetic field is applied thereto, said magnetic field being larger in the strength on the inner side than on the outer side of said rigid substrate, thereby making it possible to form a magnetic layer that is uniform in thickness, or is thicker on the inner side and thinner on the outer side. This makes it possible to provide a coated type of magnetic disc in which there is a limited difference in the reproduction output and overwriting properties between the inner and outer sites.

REFERENCES:
patent: 4551355 (1985-04-01), Ericson et al.
patent: 4557947 (1985-12-01), Deimling et al.
patent: 4587139 (1986-05-01), Hagan et al.
patent: 5166006 (1992-11-01), Lal et al.

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