Thermally compensated rotary positioning system for a disc drive
US6480364B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2000 |
| Grant date | Nov 12, 2002 |
| Priority date | — |
| Expiry date | Sep 7, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/4813
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Apparatus and method for cooling the actuator coil with a suitable heat sink structure. The heat sink thermally couples the coil to one or more of the head-carrying arms, which are positioned close enough to the disc stack that rotation of the stack cools them. In one embodiment, a gap is formed between the coil and a thermal conduit, and the gap is made wide enough to allow a majority of the gap to be filed with a solid dielectric. Another embodiment is a method for controlling the minimum gap thickness. In yet another embodiment, a rotary actuator includes a heat conduit with a concave surface for bonding to the coil, increasing rigidity and thermal conduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.