Erase bands for vertical recording

Details Erase bands for vertical recording Erase bands for vertical recording

1994-07-07

1996-02-27

Wolff, John H.

Dynamic magnetic information storage or retrieval

Head

Core

G11B 5127

Patent

active

054953790

ABSTRACT:
A magnetic head that vertically records information on a disk and which creates erase bands between the disk tracks. The head has a single pole that has a pair of erase band segments which extend from a center pole section. When the head is writing information, the erase band segments create erase bands at the outer edges of the track by not fully magnetizing the disk and/or increasing the azimuth angle of the magnetized outer edges. The azimuth angle can be increased by constructing the outer segments of the pole to extend at an angle from the center pole section. The reduction in field strength in the outer track edges can be accomplished by making the outer pole segments thinner to cause a saturation of the outer magnetic field. The weaker, angled outer track portions do not generate a significant magnetic field in a head located on an adjacent track, thereby in effect creating erase bands in the disk.

REFERENCES:
patent: 4935832 (1990-06-01), Das et al.

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