Methods for evaluating the effectiveness of protective overcoats for thin film, magnetic disk media
US5660695A · kind A · utility
4Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 20, 1995 |
| Grant date | Aug 26, 1997 |
| Priority date | — |
| Expiry date | Jan 20, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/84
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for manufacturing thin film magnetic media disks entailing the improvement arising from causing spaced electrical probes to engage spaced portions of an exposed outer surface of a disk overcoat layer; creating a voltage across the spaced electrodes; measuring a function of electrical resistance between the ends of the probes in engagement with the exposed outer surface of the overcoat layer; and employing this measured resistance function generally as a measure of wear properties of the overcoat layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.