Information recording medium having recording layer with organic polymer and dye contained therein
US5648135A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 1995 |
| Grant date | Jul 15, 1997 |
| Priority date | — |
| Expiry date | Jun 7, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31931
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An information recording medium has a recording layer which comprises a composition containing: PA1 I) at least one organic polymer selected from the group consisting of: PA2 (a) conjugated polymers whose conformations change by thermal energy, for example, polythiophene, and PA2 (b) polymers containing as a component a diene monomer and/or an aromatic-ring-containing vinyl monomer, for example, polystyrene; and PA1 II) a dye having light-absorbing ability, for example, naphthalocyanine. Despite the recording layer is of the organic type that features non-toxicity and low manufacturing cost as advantages, the recording layer makes it possible to produce a rewritable optical disc which can be recorded by a semiconductor laser (830,780 nm) employed widely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.