Disk drive spindle motor with embedded ionizing source for static charge dissipation
US6151189A · kind A · utility
55Cited by
7References
23Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 28, 1998 |
| Grant date | Nov 21, 2000 |
| Priority date | — |
| Expiry date | Dec 28, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B25/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A spindle motor for a disk drive includes a shaft, a stator, a hub, an upper bearing, a lower bearing, means for defining a gap and an ionization source. The stator is concentrically positioned about the shaft. The upper and lower bearings rotatably maintain the hub relative to the shaft and each include a plurality of balls, each ball made from a high resistivity material. The ionization source ionizes air in the gap for allowing static electric charge to dissipate through a conductive path provided by the ionized air in the gap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.