Dynamic magnetic information storage or retrieval – General recording or reproducing – Specifics of biasing or erasing
Reexamination Certificate
2007-02-01
2010-06-22
Negrón, Daniell L (Department: 2627)
Dynamic magnetic information storage or retrieval
General recording or reproducing
Specifics of biasing or erasing
CG9BS005031
Reexamination Certificate
active
07742252
ABSTRACT:
An apparatus, system, and method are disclosed for dynamically controlling a recording head substrate bias voltage. The apparatus includes a midpoint module and a substrate module. The midpoint module calculates a midpoint voltage of a plurality of data read elements and servo read elements contained in the head. The substrate module calculates a substrate bias voltage. The apparatus, system, and method dynamically control the substrate bias voltage post-assembly, minimizing certain head degradations and extending the life of associated head readers.
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Biskeborn Robert Glenn
Czarnecki Stanley W.
Iben Icko E. T.
Tretter Larry LeeRoy
International Business Machines - Corporation
Kunzler Needham Massey & Thorpe
Negrón Daniell L
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