Bump-forming media including thin intermediate reflective layer and methods for writing, reading, and erasing same
US4896314A · kind A · utility
23Cited by
8References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 1988 |
| Grant date | Jan 23, 1990 |
| Priority date | — |
| Expiry date | Apr 19, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/146
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical data storage medium includes a triple layer recording structure having an expansion layer, a retention layer and a very thin reflective layer interposed between the retention and expansion layers. The three layers are strongly bonded together so that the thermally and mechanically active expansion and retention layers can mechanically act upon each other through the intermediate reflective layer. The expansion and retention layers are dyed to selectively pass or absorb light of preselected wavelengths. The thin reflective layer is adapted to partially pass and partially reflect light of preselected wavelengths.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.