Thin film magnetic head having thin film coil embedded in...

Details Thin film magnetic head having thin film coil embedded in... Thin film magnetic head having thin film coil embedded in...

2006-06-13

2006-06-13

Heinz, A. J. (Department: 2653)

Dynamic magnetic information storage or retrieval

Head

Core

C360S123090

Reexamination Certificate

active

07061718

ABSTRACT:
On a first magnetic layer27,is formed a ring-shaped insulating layer28whose air bearing surface side edge defines a reference position for a throat height, and after forming a write gap layer29,a second magnetic layer30is formed such that the second magnetic layer extends over the ring-shaped insulating layer28.The write gap layer is selectively removed by performing an etching process using the second magnetic layer as a mask, and then the first magnetic layer is partially removed over a part of its thickness to form a trim structure. After forming a thin film coil33, 35within the ring-shaped insulating layer, a third magnetic layer is formed to be brought into contact with a rear portion of the second magnetic layer31.The third magnetic layer may be contacted with a surface, a surface and side walls or a surface, side walls and an end surface of rear portion of the second magnetic layer. In the thin film magnetic head, a pole chip defining a track width is narrow, magnetic flux saturation and leakage of magnetic flux can be suppressed in spite of a short throat height, and a high recording efficiency can be attained. The invention provides a method of manufacturing easily the thin film magnetic head having such superior performance with a high yield.

REFERENCES:
patent: 5153980 (1992-10-01), Kira
patent: 5872693 (1999-02-01), Yoda
patent: 5878481 (1999-03-01), Feng et al.
patent: 5935644 (1999-08-01), Heim
patent: 6504676 (2003-01-01), Hiner et al.
patent: A-8-339508 (1996-12-01), None
patent: A-10-105919 (1998-04-01), None

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