Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Drum record
Patent
1996-06-06
1998-03-10
Levy, Stuart S.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Drum record
G11B 560, G11B 1732
Patent
active
057268312
ABSTRACT:
The invention provides a magnetic head slider with flying height that is uniform over a recording surface and is relatively insensitive to altitude changes when used in a data storage device. In one embodiment, a slider platform carries two or more gas bearing pads in the form of TPC type pads, each having a transverse pressurization contour along at least one side edge of its face, at least one NP type pad provided with a bearing face and a recess which develops a subambient pressure level, and an ambient pressure reservoir separating each TPC type pad from each NP type pad for preventing hydrodynamic interaction between the pads. The ambient pressure reservoir defines a cavity having a depth with respect to the face of each TPC pad sufficient to maintain substantially ambient pressure in the cavity during movement of the recording medium. In another embodiment, the gas bearing pads take the form of a combination of pads with transverse pressurization contours and pads without TPC effects.
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Levy Stuart S.
Watkins Kevin M.
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