Head for perpendicular recording with a floating trailing...

Dynamic magnetic information storage or retrieval – Head – Core

Reexamination Certificate

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C360S125330, C360S128000

Reexamination Certificate

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10671639

ABSTRACT:
Heads for perpendicular recording using a floating-trailing shield as part of the magnetic circuit for writing magnetic domains in the recording media are described. The floating-trailing shield is separated from the main pole piece by a layer of non-magnetic material along its entire length and the air bearing surface of the floating-trailing shield is substantially larger than that of the main pole piece. The reluctance between the trailing shield and the underlayer in the recording medium is made so low that both are at the same magnetomotive force (or potential), so that no direct connection is needed between the floating-trailing shield and the yoke. When the head is used in a storage system with a magnetic recording medium with a soft underlayer, the floating-trailing shield is, in effect, magnetically shorted to the return pole piece during recording.

REFERENCES:
patent: 4731157 (1988-03-01), Lazzari
patent: 5075956 (1991-12-01), Das
patent: RE33949 (1992-06-01), Mallary et al.
patent: 5196976 (1993-03-01), Lazzari
patent: 5408373 (1995-04-01), Bajorek et al.
patent: 5550691 (1996-08-01), Hamilton
patent: 6407891 (2002-06-01), Chang et al.
patent: 6531202 (2003-03-01), Litvinov et al.
patent: 6809899 (2004-10-01), Chen et al.
patent: 6842313 (2005-01-01), Mallary
patent: 6894856 (2005-05-01), Nakamura et al.
patent: 6950277 (2005-09-01), Nguy et al.
patent: 2002/0034043 (2002-03-01), Okada et al.
patent: 2002/0176214 (2002-11-01), Shukh et al.
patent: 2003/0043513 (2003-03-01), Lin
patent: 2003/0117749 (2003-06-01), Shukh et al.
patent: 2003/0151850 (2003-08-01), Nakamura et al.
M. Mallory et al. “One Terabit per Square Inch Perpendicular Recording Conceptual Design,” IEEE Transactions on Magnetics, vol. 38, No. 4, Jul. 2002, pp. 1719ff.

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