Method for reading and writing a data storage medium comprising a material with a succession of zones having a first and second physical state respectively
US6392934B1 · kind B1 · utility
14Cited by
5References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2001 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Apr 19, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B9/1409
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention relates to a method for reading an information medium (1) comprising a recording layer (14) with a succession of zones of material (14a, 14c) with respective distinct first and second physical states of the material. According to the invention the recording layer is scanned with means (100) for detecting electrical fields.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.