Limited play optical storage medium, method for making the same
US7087282B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2003 |
| Grant date | Aug 8, 2006 |
| Priority date | — |
| Expiry date | Jun 13, 2024 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In one embodiment, a limited play optical storage medium for data comprises: a reflective layer, a control portion comprising an optically transparent polymeric resin and a light absorbing material, wherein the control portion has a light transmission of greater than or equal to about 70% at 650 nm, a curing index of greater than or equal to about 0.1 and a filtration index of greater than or equal to about 2.5, and wherein the light absorbing material has a minimum extinction coefficient (measured in CH2Cl2 solution) at 600 nm of greater than or equal to 1,500 mol−1·cm−1·L, a maximum extinction coefficient (measured in CH2Cl2 solution) at 650 nm of less than about 1,000 mol−1·cm−1·L, a ratio of extinction coefficient at 650 nm to 600 nm less than about 0.1, and a reactive layer disposed between the reflective layer and the control portion, wherein the reactive layer is designed to limit the time during which data on the medium (disposed on a side of the reactive layer opposite the control portion), can be accessed after exposure to oxygen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.