Writable and erasable high-density optical storage media
US6245403A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1998 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Apr 29, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/21
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to an optical storage medium comprising a substrate and a storage layer, wherein the storage layer comprises a compound of the formula (I) or (II) ##STR1## in which A and A', independently of one another, are unsubstituted or mono- or di-halo-, -hydroxy-, --C.sub.1 -C.sub.6 alkyl-, --C.sub.1 -C.sub.6 alkoxy-, -cyano- or -nitro-substituted phenyl, pyridyl, pyrrolyl, imidazolyl, furyl or thienyl, which can, if desired, be fused to a benzene ring, are halide, tetrafluoroborate or unsubstituted or with one or more halogen substituted C.sub.1 -C.sub.6 alkane-sulfonate, benzenesulfonate, C.sub.1 -C.sub.6 alkylbenzenesulfonate, C.sub.1 -C.sub.6 alkylsulfate or di-C.sub.1 -C.sub.6 alkyl-phosphonate of N--C.sub.1 -C.sub.6 alkyl-pyridiniumyl, or are unsubstituted or mono- or di-hydroxy-substituted C.sub.2 -C.sub.6 alkyl or C.sub.2 -C.sub.6 alkenyl, whose chain may be uninterrupted or interrupted by one or two oxygen atoms, B and B', independently of one another, are 2 H, S, S.sub.2 or SO.sub.2, and n and n', independently of one another, are each a number from 1 to 4. The invention also relates to a process for the optical writing, storage, reading, modification or eras…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.