Optical information recording medium
US6657948B1 · kind B1 · utility
8Cited by
10References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2000 |
| Grant date | Dec 2, 2003 |
| Priority date | — |
| Expiry date | Feb 24, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/24304
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical information recording medium includes a transparent substrate, a thin film layer formed on said transparent substrate and having a recording film, a thin film protecting film formed on said thin film layer, and a substrate protecting film formed on said transparent substrates. A neutral plane of deformation caused by a temperature change of the optical information recording medium is present within the thin film layer. Consequently, it has become possible to provide an optical information recording medium which can prevent deformation (warpage) caused by temperature and humidity changes and be readily manufactured.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.