Head for perpendicular magnetic recording with a shield...

Details Head for perpendicular magnetic recording with a shield... Head for perpendicular magnetic recording with a shield...

2006-02-21

2006-02-21

Tupper, Robert S. (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Core

Reexamination Certificate

active

07002775

ABSTRACT:
An embodiment of the invention is a head for perpendicular recording that has a trailing shield and side shields that are connected to the return pole piece by two studs of ferromagnetic material. The studs extend parallel to the track direction and are located a sufficient distance away from the main pole piece to reduce the flux flow from the main pole piece to the studs. Optionally the studs can be recessed behind the air-bearing surface. The preferred embodiment of the invention is a magnetic transducer with separated read and write heads for perpendicular recording.

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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.
Kanai, et al., “Numerical Analysis of Narrow-track Single-pole-type Head with side Shields for 1 Tb/in2 recording”; by; J. Applied Physics; vol. 93, No. 10; May 15, 2003.

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