Ultra-smooth ceramic substrates and magnetic data storage media prepared therefrom
US5626943A · kind A · utility
23Cited by
22References
50Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 2, 1994 |
| Grant date | May 6, 1997 |
| Priority date | — |
| Expiry date | Jun 2, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Layered substrates are disclosed having an ultra-smooth surface finish thereon rendering them useful in making high density magnetic storage media. The layered substrates are comprised of a non-oxide ceramic core coated with a smoothing layer comprised of an amorphous metal, particularly certain amorphous metal alloys based on chromium, molybdenum, tungsten, and mixtures thereof. Also disclosed are magnetic storage media comprising the layered substrates, as well as processes for making the substrates and magnetic media.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.