Method of and apparatus for making optical storage devices
US5073219A · kind A · utility
17Cited by
5References
40Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 11, 1989 |
| Grant date | Dec 17, 1991 |
| Priority date | — |
| Expiry date | Dec 11, 2009 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T156/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a process for mass producing optical storage sheets, an elongate film of a liquid crystalline material is fed lengthwise along a path through an aligning gate. The aligning gate applies to successive areas of the film a field which aligns the molecules. The field may be an electric field and/or a shear field. An aligning layer, such as a surfactant layer may also be used for alignment of the film areas. The aligned film may then be cut into pieces for use as microfiches or microfilms. The film material is preferably a liquid crystal polymer material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.