Photopolymer resins for photo replication of information layers
US8399175B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 2008 |
| Grant date | Mar 19, 2013 |
| Priority date | — |
| Expiry date | Mar 29, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/24038
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Photopolymer resins are disclosed which includes metal and/or ceramic surface chelating agents to provide strong bonding of the photopolymer resin to the inorganic surface of the first information layer of an optical disc. The resins also include a fast surface cure and glass transition temperature controlling monomers that provides easy stamper separation The disclosed photopolymer resins also include short wavelength (<405 nm) surface cure initiators. The resins may also optionally include shrinkage control oligomers and/or polymer fillers or a combination of both Use of the disclosed resins eliminates two steps from the manufacture of a multiple information layer optical disc as the formation of spacer layers and the curing of spacer layers is no longer necessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.