Vapor-deposited thin-film recording heads

A vapor-deposited thin-film recording head and a unique reading technique are described. The head structure used for both write and read is similar to that of the Mated-Film memory element. Conventional longitudinal recordings at 4000 flux reversals per inch have been written with a thin-film head i...

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Bibliographic Details
Published in:IEEE transactions on magnetics 1971-09, Vol.7 (3), p.675-679
Main Authors: Kaske, A., Oberg, P., Paul, M., Sauter, G.
Format: Article
Language:English
Subjects:
Etching
Fabrication
Frequency
Geometry
Insulation
Magnetic heads
Magnetic recording
Magnetization
Read-write memory
Transistors
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Description
Summary:A vapor-deposited thin-film recording head and a unique reading technique are described. The head structure used for both write and read is similar to that of the Mated-Film memory element. Conventional longitudinal recordings at 4000 flux reversals per inch have been written with a thin-film head in 300-Å-thick iron films having a coercivity of 80 Oe. Conventional longitudinal recordings up to 1600 flux reversals per inch in thin-film media and in oxide media have been sensed with the thin-film head. Although a one-turn sense line is used, flux amplification is obtained because the head magnetization, not the flux from the recording, is sensed. This also results in an output signal that is independent of recording media velocity.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.1971.1067112