Chemisorptive substance, aligned liquid-crystal film and liquid-crystal display element both made by using the same, and processes for producing these
US6495221B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 18, 1999 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | May 18, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC09K2323/023
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The present invention provides a new chemical adsorbent which can form an extremely thin and transparent film in nanometer order which is fixed uniformly and firmly on a substrate, and give an alignment characteristic of high thermal stability to the thin film; as well as a liquid crystal alignment layer and a liquid crystal display device having a desirable alignment characteristic, a superior alignment control force over a liquid crystal molecule, and a superior thermal stability by using the above-mentioned chemical adsorbent. This purpose can be actualized by developing a new compound which is transparent and stable in a range of a visible ray (a wavelength from 400 nm to 700 nm), and has a photosensitivity in a range of an ultraviolet ray and a far-ultraviolet ray (a wavelength from 200 nm to 400 nm), and can form a thin film in a monolayer through a chemisorption on a substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.