Optical recording medium
US5587216A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 26, 1994 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | Oct 26, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/265
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium capable of recording, reproducing and erasing information wherein a pulsating phenomenon where dielectric layer provided on the top and bottom of the recording thing film layer are thermally expanded, and contracted through the recording and erasing so that an inferior phenomenon of moving the recording thin film layer along the guiding groove in the disc rotating direction is considerably restrained, whereby, uneven thickness in the recording thin film layer is removed, thus making it possible to prevent the signal quality from being deteriorated, and the repeating characteristics of the recording and erasing operations are exceptionally improved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.