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Perpendicular Recording Head for Flexible-disk File Applications

IP.com Disclosure Number: IPCOM000060118D
Original Publication Date: 1986-Feb-01
Included in the Prior Art Database: 2005-Mar-08
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Gallagher, TJ: AUTHOR [+2]

Abstract

A perpendicular recording head for flexible media applications is described which comprises a W-shaped ferrite core in which each leg of the head is driven by an individual coil. For writing, the coils are connected so that the field produced by each pole reinforces the other, while for reading, the coil connection is reversed to produce a ring- head read arrangement whose resolution is determined by the gap wi

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Perpendicular Recording Head for Flexible-disk File Applications

A perpendicular recording head for flexible media applications is described which comprises a W-shaped ferrite core in which each leg of the head is driven by an individual coil. For writing, the coils are connected so that the field produced by each pole reinforces the other, while for reading, the coil connection is reversed to produce a ring- head read arrangement whose resolution is determined by the gap wi

The head comprises a W-shaped ferrite core 1 in which center poles 2, 3 are each driven by an individual coil 4, 5. The poles 2 and 3 are terminated in NiFe thin film poles 6, 7 to produce a narrow gap 8.

During the WRITE process, the coils 4, 5 are connected as shown in the figure so that the field produced by each pole reinforces the other. In this mode, the head functions as a pole-head whose width is about twice the individual pole thickness.

During the READ process, the coils 4, 5 are connected in the reverse manner, as shown in the figure, to provide a ring-head arrangement whose resolution is determined by the width of gap 8. This head structure is suitable for high linear densities in excess of 100 KBPI.

Disclosed anonymously.

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