Optical recording medium and production of the same
US4686169A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 8, 1985 |
| Grant date | Aug 11, 1987 |
| Priority date | — |
| Expiry date | Nov 8, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/163
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical recording medium comprising a substrate and an information recording layer which consists of monolayer assemblies comprising a photochromic compound of which is based on cis-trans isomerization such as an amphipathic derivative of azobenzene, indigo or thioindigo having a long chain substituent, which monolayers are formed on the substrate by the Langmuir-Blodgett method and oriented in a two-dimensional plain. When the recording medium is irradiated by light, light absorption spectrum of the recording layer changes so that information is recorded. Since the photochromic compound is oriented in a monolayer, its photochromism lasts long.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.