Magnetic shield for flux leakage reduction from spindle motor
US6522498B1 · kind B1 · utility
6Cited by
14References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 17, 2000 |
| Grant date | Feb 18, 2003 |
| Priority date | — |
| Expiry date | Feb 6, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/1466
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a magnetic shield that would reduced the magnetic flux leakage from the base of the spindle motor to the printed circuit board assembly (PCBA) in a disc drive. The magnetic shield integrated in the disc drive as part of the spindle motor without increasing costs to assembly of the disc drive. The magnetic shield is made of layers of different materials to provide effective shielding. The magnetic shield is designed such that shielding effect is not affected during temperature changes in the disc drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.