Metal working – Method of mechanical manufacture – Electrical device making
Patent
1989-06-30
1991-05-21
Hall, Carl E.
Metal working
Method of mechanical manufacture
Electrical device making
360121, G11B 542
Patent
active
050163426
ABSTRACT:
An ultra small track width magnetic transducer and manufacturing method. The transducer has two coplanar confronting magnetic poles provided by a thin film layer of magnetic material. The thickness of the layer defines a track width. A transducing gap is etched in the magnetic layer by utilizing focused ion beam milling technology. The thusly obtained gap has a predetermined length and depth and it separates the magnetic layer into two confronting coplaner magnetic poles. A layer of non-magnetic material is deposited over the magnetic layer to fill the transducing gap. The transducing gap may be etched in a plane extending orthogonally to the plane of the magnetic core layer. Alternatively, the transducing gap plane may extend at an oblique angle to the magnetic core layer to obtain a transducing gap useful in aszimuth recording/playback.
REFERENCES:
patent: 3224074 (1965-12-01), Peters
patent: 3621153 (1971-11-01), Wenner
patent: 4158213 (1979-06-01), Griffith
patent: 4219853 (1980-08-01), Albert et al.
patent: 4246620 (1981-01-01), Kaminaka et al.
patent: 4251910 (1981-02-01), Griffith
patent: 4260450 (1981-04-01), Neu
patent: 4281357 (1981-07-01), Lee
patent: 4389105 (1984-12-01), Lee
patent: 4416056 (1983-11-01), Takahashi
patent: 4418472 (1983-12-01), Lorenze, Jr.
patent: 4435900 (1984-03-01), de Wilde
patent: 4489484 (1984-12-01), Lee
patent: 4550353 (1985-10-01), Hirai et al.
patent: 4652954 (1987-03-01), Church
patent: 4670972 (1987-06-01), Sakakima
patent: 4677036 (1987-06-01), Nakamura et al.
patent: 4685014 (1987-08-01), Hanazono et al.
patent: 4701820 (1987-10-01), McClure
patent: 4727643 (1988-03-01), Schewe et al.
patent: 4804816 (1989-02-01), Hata
Solid State Technology, Dec. 1985, "Seimiconductor Applications of Focused Ion Beam Micromachining", D. C. Shaver & B. W. Ward.
Gooch Beverley R.
Pisharody Raghavan K.
Ampex Corporation
Hall Carl E.
Strnad Elizabeth E.
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