Fully shielded perpendicular recoding writer

Details Fully shielded perpendicular recoding writer Fully shielded perpendicular recoding writer

2006-05-09

2006-05-09

Cao, Allen (Department: 2652)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07042682

ABSTRACT:
Conventional perpendicular writers that utilize an extended return pole are subject to large flux leakage. This problem has been reduced in the prior art by adding a downstream shield. This still leaves significant upstream leakage. This has now been eliminated by adding an upstream shield and then connecting the up and downstream shields by using side shields. The latter need not extend all the way from the downstream to the upstream shield in which case their thickness is increased relative to the full side shields.

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