Grain isolated multilayer perpendicular recording medium
US5834085A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1996 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Feb 26, 2016 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A new type of multilayer structure is shown which has superior properties for retaining magnetic transitions on a surface as they are written by a recording transducer. The multilayer is composed of crystal grains which are electronically isolated from one another (exchange isolated). The exchange isolation of the grains creates a type of medium which can viably store data at more than 2 billions bits per square inch. A method is described for making such a structure and the storage of magnetic transitions at extremely high density is demonstrated. Recording with previous multilayer candidates is also shown for comparison purposes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.