Spindle motor hub having equivalent MR read element bias voltage to mitigate potential between disk and MR read element
US6583968B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 31, 2001 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | Feb 5, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2005/0016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An aspect of the invention can be regarded as a disk drive that includes a disk drive base and a magnetic disk. The disk drive further includes a rotary actuator coupled to the disk drive base. The rotary actuator has an MR read element disposed adjacent the magnetic disk. The MR read element has a bias voltage. The disk drive further includes a rotatable spindle motor hub for rotating the magnetic disk positioned on the spindle motor hub. The spindle motor hub is in electrical communication with the magnetic disk. The spindle motor hub is mechanically coupled to and electrically insulated from the disk drive base. The disk drive further includes a circuit for applying a voltage equivalent to the bias voltage to the spindle motor hub such that a voltage potential between the MR read element and the magnetic disk is mitigated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.