Magnetic recorder apparatus with reduced debris accumlation on the recorder head and slider
US6084743A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 2, 1993 |
| Grant date | Jul 4, 2000 |
| Priority date | — |
| Expiry date | Dec 2, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B33/14
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A common cause for catastrophic failure in a magnetic disk storage system is due to the collection of debris on the slider/head assembly. Two factors contributing to these failures are: PA1 a) disk liquid lubricant provides a sticky medium for debris accumulation; and PA1 b) electrostatic charge on the slider assembly generated by friction attracts and accumulates debris. A method for reducing electrostatic charge build-up uses a conductive coating on a surface area of the slider. By providing a conducting path to the metallic disk on which the recording medium is applied, the triboelectrically generated charge on the slider is allowed to bleed-off. Providing an additional overcoat of a solid self-lubricant, and forming a wedge-shaped slider load-bearing surface for deflection of surface debris, results in the reduction of both failure causes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.