Corrosion and wear resistant magnetic disk
US4898774A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 17, 1986 |
| Grant date | Feb 6, 1990 |
| Priority date | — |
| Expiry date | Dec 17, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A film of magnetic recording media is covered with a layer comprising ZrO.sub.2. Advantageously, the ZrO.sub.2 layer inhibits corrosion in the underlying magnetic recording media. The ZrO.sub.2 layer is wear resistant and also exhibits reduced static friction. In one embodiment of our invention, an intermediate layer is sputtered onto the media and the ZrO.sub.2 is sputtered onto the intermediate layer. Advantageously, the intermediate layer adheres strongly to both the media and the ZrO.sub.2. We have discovered that by providing the intermediate layer, static and dynamic friction between a read-write head and the disk tends to remain consistently low, and reliability of the disk is enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.