Thermally conductive overmold for a disc drive actuator assembly
US6600633B2 · kind B2 · utility
23Cited by
41References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 24, 2001 |
| Grant date | Jul 29, 2003 |
| Priority date | — |
| Expiry date | Oct 24, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/4813
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thermally conducting and electrically insulating overmold encapsulates and supports an actuator coil in a disc drive assembly. The overmold is made from a base resin mixed with a ceramic filler compound such as boron nitride, alumina, aluminum nitride, magnesium oxide, zinc oxide, silicon carbide, beryllium oxide, chromium oxide or some combination thereof. The base resin is preferably polypheneline sulfide. Glass filler and/or a coupling agent are also preferably added. The overmold reduces off track read/write head position errors due to popping caused by thermal expansion and contraction of the actuator coil.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.