Method for corrosion susceptibility testing of magnetic heads using simulated disk corrosion products
US6512382B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 17, 2001 |
| Grant date | Jan 28, 2003 |
| Priority date | — |
| Expiry date | Jul 17, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/455
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method of corrosion susceptibility testing of a magnetic recording head is disclosed. The method includes applying simulated disk corrosion products containing cobalt salts to the recording head. The recording head is then placed in an environmental chamber with elevated temperature and humidity. The resistance of the sensor on the recording head is measured after removal from the chamber and compared with the resistance before placement in the chamber. A significant change in resistance indicates a corrosion failure. This component level testing gives a more accurate indication of the corrosion performance of the recording head when placed in a disk drive.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.