05016342 is referenced by 38 patents and cites 27 patents.

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.

Title
Method of manufacturing ultra small track width thin film transducers
Application Number
7/373762
Publication Number
5016342
Application Date
June 30, 1989
Publication Date
May 21, 1991
Inventor
Beverley R Gooch
Sunnyvale
CA, US
Raghavan K Pisharody
Palo Alto
CA, US
Agent
Elizabeth E Strnad
Assignee
Ampex Corporation
CA, US
IPC
G11B 5/42
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