Method and apparatus for improved thermal isolation and stability of disk drives
US4980786A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 14, 1988 |
| Grant date | Dec 25, 1990 |
| Priority date | — |
| Expiry date | Nov 14, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B25/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A thermally independent dedicated servo disk drive where the temperature is kept within an acceptable range and temperature gradients that can cause differential thermal expansion are eliminated to minimize off tracking due to differential thermal expansion of thermally sensitive components. A novel isolated "box within a box" architecture is utilized to provide a thermal buffer to external temperature gradients and an inner HDA support structure is coupled to an outer housing with thermally insulative isolators which prevent the conductive transfer of heat from external sources where the outer housing and isolators create a thermal buffer to shield the inner HDA support structure from external heat sources. In addition, certain heat generating components not integrated into the symmetrical thermal "box within a box" design are isolated where possible. Thus, a thermally symmetrical environment is provided in the area of thermally sensitive components that could otherwise degrade tracking during temperature transients.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.