Magnetic recording/reproducing system comprising a glass substrate thin film magnetic disk and a flying magnetic head with defined spacing and surface roughness
US5080948A · kind A · utility
37Cited by
6References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 19, 1989 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | May 19, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24355
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A magnetic recording medium comprising a glass substrate and a magnetic thin film thereon is provided for use in a magnetic recording/reproducing system having a flying magnetic head. Floating performance is improved when the glass substrate has a surface roughness Rmax of 10-80 A and the magnetic thin film has a surface roughness Rmax of 50-150 .ANG.. Recording and reproducing information on a magnetic disk is carried out by driving the magnetic disk while keeping a magnetic head floating relative to the disk at a spacing therebetween of up to 0.2 .mu.m.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.