Return pole field reduction for perpendicular write head

Details Return pole field reduction for perpendicular write head Return pole field reduction for perpendicular write head

2007-10-30

2007-10-30

Cao, Allen (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

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Reexamination Certificate

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10844170

ABSTRACT:
In a single vertical pole magnetic writer, flux passing through the return pole can sometimes be strong enough to erase previously recorded data. This problem has been overcome by the addition of a second return pole that is magnetically connected to the conventional return pole for the purpose of collecting leaked flux, thereby preventing it from reaching the underlayer.

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“Writing performances of cusp-field single-pole head”, by Kazuyuki Ise et al., Jrnl. of Magnetism and Magnetic Materials 235 (2001) 187-190.

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