System, method and information medium for storing and reading information as a difference in a surface potential or a surface charge density
US6449240B1 · kind B1 · utility
4Cited by
5References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 28, 2000 |
| Grant date | Sep 10, 2002 |
| Priority date | — |
| Expiry date | Mar 28, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information medium capable of recording the information at a high density in a convenient manner is provided. Also provided is a method capable of readily reproducing the information recorded at such high density, and a system which can be used therefor. In the present invention, the information is read by reading difference in crystallographic state, crystallographic phase or constituent material as a difference in surface potential or surface charge density.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.