Super-resolution optical recording medium
US8092887B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 3, 2008 |
| Grant date | Jan 10, 2012 |
| Priority date | — |
| Expiry date | Jun 30, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldMicro-structural and nano-technology
- WIPO sectorChemistry
Abstract
The invention relates to the field of optical information recording. According to the invention, an optical storage structure is proposed comprising a substrate equipped with physical marks whose geometrical configuration defines the recorded information, a superposition of three layers on top of the substrate marks, and a transparent protective layer on top of this superposition, the superposition comprising a layer of indium or gallium antimonide inserted between two ZnS/SiO2 dielectric layers. The antimonide layer has a polycrystalline structure with an average crystal grain size between 5 and 50 nanometers. The non-linear behavior of the superposition of three layers under the read laser makes it possible to read information having a size below the theoretical resolution of the reading system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.