Planar, multilayered, laser-optical recording material
US4913949A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 8, 1988 |
| Grant date | Apr 3, 1990 |
| Priority date | — |
| Expiry date | Jul 8, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A planar, multilayered, laser-optical recording material comprises PA0 (a) a dimensionally stable, optically clear base material composed of a plastics substance and having a structured surface, PA0 (b) a superposed intermediate layer which is insoluble in organic solvents and which acts as a diffusion barrier thereagainst, and superposed thereon PA0 (c) an amorphous, thermally alterable, dye-containing recording layer producible by application from a solution and drying, wherein said intermediate layer (b) PA0 (b.sub.1) is from 5 to 95 nm thick and, based on (b), consists of PA0 (b.sub.2) from 88 to 99.5% by weight of an oxide and/or hydrated oxide of one or more of the elements of the group consisting of titanium, zirconium, hafnium, thorium, vanadium, niobium, tantalum, tungsten, aluminum, gallium, indium, silicon, germanium and tin and of PA0 (b.sub.3) from 0.5 to 12% by weight of a hydrocarbyl and PA0 (b.sub.4) is producible by dissolving one or more alkoxides of one or more of the abovementioned elements in a polar liquid medium essentially comprising a C.sub.1 -C.sub.6 -alkanol, applying this solution to the surface of base material (a) and heat-treating the moist layer obta…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.