Optical information recording medium
US7095706B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 2005 |
| Grant date | Aug 22, 2006 |
| Priority date | — |
| Expiry date | Mar 18, 2025 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical information recording medium containing a first information substrate including a first substrate having a guide groove thereon, a first recording layer including a dye, overlying the first substrate and a first reflective layer being a semi-transmittance layer, overlying the first recording layer, a second information substrate comprising, a second substrate having a guide groove thereon, a second recording layer comprising a dye, overlying the second substrate, a second reflective layer being a semi-transmittance layer, located overlying the second recording layer and a light transmittance protective layer overlying the second reflective layer and a transparent intermediate layer. Further, the following relationships (1) and (2) are satisfied: (1) 0.3≦nd/λ≦0.7, wherein n represents refractive index in the complex refractive index n-ik of the light transmittance protective layer, d represents a thickness thereof, and λ is at least one of a recording wavelength and a playback wavelength, (2) k≦0.05, wherein k represents absorption index of the light transmittance protective layer of the complex refractive index n-ik.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.