Dynamic magnetic information storage or retrieval – Record transport with head stationary during transducing – Disk record
Patent
1997-01-09
1998-10-13
Heinz, A. J.
Dynamic magnetic information storage or retrieval
Record transport with head stationary during transducing
Disk record
360 9908, G11B 1708, G11B 1702
Patent
active
058221506
ABSTRACT:
A disk drive is disclosed including a substantially monolithic stator. The stator is formed by a metal injected molding (MIM) process in which high silicon iron is sintered to produce a stator made from loss magnetic material. The low loss magnetic material is a low hysteresis loss, high resistivity material. A substantially monolithic stator without multiple laminations is thus achieved. Avoiding stator laminations in this manner permits the fabrication of a disk drive having a significantly reduced vertical profile while still suppressing undesired eddy current and hysteresis losses in the stator. The stator is advantageously directly machined with a central bore to receive a bearing assembly for the spindle of the hub of the drive motor. The disclosed stator geometry is optimized in three dimensions to minimize stator volume and maximize the stator winding volume.
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Patent application entitled: "Air Bearing Slider and Head Gimbal Assembly", (Attorney Docket No. M-2849) by Bruce Emo, et al, Serial No. 08/271,398, filed Jul. 6, 1994.
"Prairie 120" PrairieTek Corporation publication, .COPYRGT.1989.
Heid David W.
Heinz A. J.
Integral Peripherals, Inc.
Zustak Frederick J.
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