Fabrication method for liquid crystal alignment layer by magnetic field treatment
US5742370A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 26, 1997 |
| Grant date | Apr 21, 1998 |
| Priority date | — |
| Expiry date | Feb 26, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/13378
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A fabrication method for a liquid crystal alignment layer which has an excellent liquid crystal orientation efficiency and stability, and which can be mass-produced includes coating a thermoplastic polymer film on a transparent electrode to have a thickness of not less than 500.perp., fabricating a temporary cell with a structure of transparent electrode (ITO glass) / polymer film / liquid crystal / polymer film / transparent electrode (ITO glass) by attaching two transparent electrodes having polymer films coated thereon and infusing liquid crystal, fabricating a stack with a structure of transparent electrode (ITO glass)/polymer film /liquid crystal by contacting liquid crystal on the polymer film, heating the temporary cell or the stack at lower than phase separation temperature of a blend of liquid crystal and the polymer film, while applying a magnetic field exceeding 0.2 tesla, and cooling the temporary cell or the stack in the magnetic field at a cooling rate of not more than 100.degree. C. per minute.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.