Optical information medium and production method therefor
US7153558B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 23, 2003 |
| Grant date | Dec 26, 2006 |
| Priority date | — |
| Expiry date | Oct 31, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B7/2545
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides an optical information medium that is less susceptible to warp in the disk surface while offering significantly high scratch resistance and abrasion resistance, and a method for producing the optical information medium. An optical information medium (1) comprising a supporting substrate (2) and a film element, the film element disposed on the supporting substrate (2) and composed of one or more layers including at least a recording layer (5) or a reflective layer (3), wherein at least one of the supporting substrate-side surface and the film element-side surface is formed of a hard coat layer (9) of a cured product of a composition comprising (A) inorganic fine particles with an average particle size of 100 nm or less, (B) a reactive silicone, and (C) an active energy ray-curable compound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.