Magnetic disk medium with designed textured surfaces and controlled surface roughness and method of producing same
US5576918A · kind A · utility
39Cited by
35References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1993 |
| Grant date | Nov 19, 1996 |
| Priority date | — |
| Expiry date | Dec 21, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B11/10584
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a magnetic disk medium, a substrate is etched to have a designed, controlled topography. A magnetic recording medium and a protective layer are provided over the substrate. A method for controlling production of the surface characteristics of the magnetic disk medium is controlled to optimize surface characteristics for use of the magnetic disk medium in a magnetic disk apparatus that reads information stored on the magnetic disk medium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.