Magnetic recording disc and method of making same

Details Magnetic recording disc and method of making same Magnetic recording disc and method of making same

1980-04-08

1982-07-06

Wolff, John H.

Dynamic magnetic information storage or retrieval

Record medium

Disk

G11B 582

Patent

active

043386431

ABSTRACT:
In a method of making a magnetic recording sheet, a magnetic material is applied on a web in a layer consisting of a number of contiguous first strip-like zones and second strip-like zones which are alternately arranged in parallel to each other. The ratio of the width of the first strip-like zone to that of the second strip-like zone is within a range of 1:3 to 3:1. In the first strip-like zones having a width of not more than 5 mm the magnetic particles are oriented in a first direction, and in the second strip-like zones magnetic particles are oriented in a second direction which is inclined with respect to the first direction at an angle from 60.degree. to 120.degree.. With this particular orientation of the magnetic particles in the magnetic layer when the magnetic layer is applied on a web, the orientation of the magnetic particles become almost random while the magnetic layer is hardened. The magnetic recording disc thus prepared has a very low output fluctuation and a higher output level.

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