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Interleaved Multielement Magnetic Heads

IP.com Disclosure Number: IPCOM000075965D
Original Publication Date: 1971-Dec-01
Included in the Prior Art Database: 2005-Feb-24
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Stenning, TW: AUTHOR

Abstract

The track density attainable with thin film multielement magnetic heads is limited, because the overall width of the elements is considerably greater than the width of their respective magnetic pole pieces.

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Interleaved Multielement Magnetic Heads

The track density attainable with thin film multielement magnetic heads is limited, because the overall width of the elements is considerably greater than the width of their respective magnetic pole pieces.

To overcome this problem, a slider 1 (shown schematically) has data head elements 10 with pole pieces 11 pitched at spacing d and another such slider 2, having similarly pitched elements 20 and pole pieces 21, is offset by d/2 from slider 1. Each slider has a pair of servo head elements 12, 13 and 22, 23, and both sliders use a common pair of servo tracks. Slider 1 is positioned by aligning each of elements 12 and 13 with a respective one of the servo tracks. Slider 2 is positioned by aligning element 22 with the boundary between the servo tracks. Thus, by using these different positioning criteria, the two sliders can be made identical, element 23 being redundant.

Alternatively, nonidentical sliders need have only a single servo element spaced from the data elements by differing amounts, the difference being equal to the required offset.

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