Dual gasket for manufacturing of hermetically-sealed hard disk drive
US11842754B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 10, 2022 |
| Grant date | Dec 12, 2023 |
| Priority date | — |
| Expiry date | May 10, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/148
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A hard disk drive (HDD) includes an enclosure base, a first cover coupled to the base, and two separate gasket seals composed of different materials and configured to seal the interface between the first cover and the base. One gasket seal is composed of a material having a low permeability to helium or another lighter-than-air gas contained within the HDD, and the other gasket seal is composed of material having a low water vapor or moisture transmission. By using two separate independent gaskets which have different attributes, the lighter-than-air gas concentration is kept high and humidity is kept low during manufacturing testing, prior to affixing a hermetic second cover over the first cover, and degradation of HDD performance due to change of flying height is ultimately avoided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.