Stitched pole write element with a T-shaped pole tip portion

Details Stitched pole write element with a T-shaped pole tip portion Stitched pole write element with a T-shaped pole tip portion

2006-10-03

2006-10-03

Davis, David (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

07116517

ABSTRACT:
A T-shaped pole tip portion of an upper pole of a write element for a magnetic disk drive is provided. One end of the pole tip portion, constituting the bottom of the “T,” forms a narrow nose segment at an air bearing surface, while a wing segment at the opposite end of the pole tip portion constitutes the cross-bar top of the “T.” A transition segment extends between the nose segment and the wing segment. A yoke portion of the upper pole includes a surface that is parallel to the air bearing surface and recessed therefrom by a P3R depth. The transition segment does not widen significantly until after the P3R depth, accordingly, the wing segment is recessed from the air bearing surface by more than the P3R depth.

REFERENCES:
patent: 5198950 (1993-03-01), Wada et al.
patent: 5208715 (1993-05-01), Mowry
patent: 5600519 (1997-02-01), Heim et al.
patent: 5801910 (1998-09-01), Mallary
patent: 5805391 (1998-09-01), Chang et al.
patent: 6055137 (2000-04-01), Ishiwata et al.

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