Leak detection system of hard disk drives with lubricant reservoir
US6958876B2 · kind B2 · utility
7Cited by
24References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 27, 2001 |
| Grant date | Oct 25, 2005 |
| Priority date | — |
| Expiry date | Oct 23, 2022 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B25/043
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for detecting leakage from a disk drive enclosure includes providing a lubricating composition having a lubricating material and a tag material therein. The tag material has a volatility characteristic that is amenable to analysis. The method includes measuring a concentration of the tag material in the vapor phase. By measuring a concentration of the tag material, a leak rate of the lubricating material can be determined. The lubricating composition may include a perfluoropolyether lubricating material and a halogenated sulfur tag material such as SF6 and/or S2F10.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.