Optical data recording medium and method for reproducing recorded data
US8194513B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2010 |
| Grant date | Jun 5, 2012 |
| Priority date | — |
| Expiry date | Jun 11, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B2007/2571
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical data recording medium, in which irradiation of a light beam is used for recording and/or reproducing data includes (i) a substrate having an a rise and/or a recess which are a light-incident surface, (ii) a reflective layer, provided on the light-incident surface of the substrate, for reflecting the light beam, (iii) a light absorption layer for converting, to heat, a light of the light beam to heat on the surface of the reflective layer, (iv) a reproducing layer, provided on the surface of the heat-light converting layer, having a transmittance that changes in accordance with a light intensity distribution of the light beam. The optical data recording medium is excellent in super-resolution property, and enables reproduction of a shorter mark length.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.