Process for producing an optical recording medium with several stages and medium obtained thereby
US7909957B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | May 17, 2005 |
| Grant date | Mar 22, 2011 |
| Priority date | — |
| Expiry date | Nov 27, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/266
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The recording medium comprises at least a first (L1) and a second (L2) micro-structured stage assembled by an adhesive layer (4) and arranged between micro-structured bottom (2) and top substrates. A polymerizable layer forming the adhesive layer (4) is deposited on the first stage (L1). Then a micro-structured transparent matrix (5) is provisionally placed on the adhesive layer (4) so as to micro-structure the adhesive layer (4). Polymerization of the adhesive (4) is performed by exposure, through the matrix (5), with a polymerization light. Then the matrix (5) is removed and the second stage (L2) is deposited on the micro-structured adhesive layer (4). Then an additional adhesive layer (9) is deposited on the second stage (L2) and the micro-structured matrix (5) is definitively placed on the additional adhesive layer (9) so as to form the top substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.