Dynamic magnetic information storage or retrieval – Head – Core
Reexamination Certificate
2006-03-07
2006-03-07
Heinz, A. J. (Department: 2653)
Dynamic magnetic information storage or retrieval
Head
Core
Reexamination Certificate
active
07009812
ABSTRACT:
The invention is a magnetic transducer with separated read and write heads for perpendicular recording. The write head has a trailing shield that extends from the return pole piece toward the main pole piece to form the write gap at the air-bearing surface. One embodiment of the trailing shield is a two part structure with a pedestal and a much smaller tip that confronts the main pole piece at the gap. In one embodiment a sink of non-magnetic, electrically conductive material is disposed in the separation gap between the read head and the flux bearing pole piece. The sink is preferably made of copper and does not extend to the ABS.
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Hsu Yimin
Le Quang
Lee Hin Pong Edward
Nix James Lamar
Pentek Aron
Heinz A. J.
Hitachi Global Storage Technologies - Netherlands B.V.
Knight G. Marlin
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