Etched erase band feature for thin film recording heads

Details Etched erase band feature for thin film recording heads Etched erase band feature for thin film recording heads

1994-07-07

1996-09-10

Levy, Stuart S.

Dynamic magnetic information storage or retrieval

Head

Core

360119, 360122, G11B 5187, G11B 5127, G11B 523

Patent

active

055554822

ABSTRACT:
A magnetic head that creates erase bands on the outer edges of a track. The magnetic head has a trailing edge pole that is separated from a leading edge pole by a gap. The leading edge pole has a width that is less than the width of a center section of the trailing edge pole. The thinner leading edge pole creates a saturation of the magnetic field at the outer edges of the leading pole. Saturation at the outer edges of the leading pole prevents a full magnetization of the disk along the outer edges of the track. The poorly magnetized outer track portions will not generate a significant amount of noise in a head located above an adjacent track. The saturated outer leading pole edges in effect create an erase band along the outer edges of the track.

REFERENCES:
patent: 3882544 (1975-05-01), Hughes
patent: 4970616 (1990-11-01), Ramaswamy
patent: 4984118 (1991-01-01), Springer
patent: 5227939 (1993-07-01), Gooch
patent: 5267112 (1993-11-01), Batra et al.
patent: 5315469 (1994-05-01), McNeil

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