Thin film magnetic head and manufacturing method thereof

Details Thin film magnetic head and manufacturing method thereof Thin film magnetic head and manufacturing method thereof

2006-05-16

2006-05-16

Cao, Allen (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

07046480

ABSTRACT:
The invention is directed to improvement of a write element of a thin film magnetic head. The first pole portion projects from a flat surface of a first yoke portion at a medium-facing surface side and having a reduced width at its upper end. The second pole portion faces the upper end of the first pole portion, having the same width as the upper end of the first pole portion, with the gap film interposed between the second pole portion and the upper end of the first pole portion. The first pole portion includes a magnetic film adjacent to the gap film, the magnetic film etched at both sides in width direction to have a narrowed portion having substantially the same width as the second pole portion, and a base portion connected to the narrowed portion, increasing in thickness toward the narrowed portion.

REFERENCES:
patent: 6043959 (2000-03-01), Crue et al.
patent: 6259583 (2001-07-01), Fontana, Jr. et al.
patent: 6445551 (2002-09-01), Asatani et al.
patent: 6456459 (2002-09-01), Sasaki
patent: 6631054 (2003-10-01), Miyazaki et al.
patent: 6754052 (2004-06-01), Asida et al.
patent: 6812543 (2004-11-01), Kamijima
patent: 2001/0017751 (2001-08-01), Miyazaki et al.
U.S. Appl. No. 10/687,634, filed Oct. 20, 2003, Sasaki et al.
U.S. Appl. No. 10/759,005, filed Jan. 20, 2004, Sasaki et al.

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