Inducing tilted perpendicular alignment in liquid crystals
US5620755A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 1994 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Jun 15, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/263
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A substrate (20) is treated prior to use to induce a near-perpendicular orientation of a liquid crystal director (26) relative to the substrate. A layer of silica (98) is deposited upon the substrate (20) by in-line magnetron sputtering as the substrate ( 20) is moved past the sputtering target (78), and the silica-coated substrate (20) is thereafter treated with a long-chain alcohol. The alcohol-treated substrate (20) is covered with a layer of liquid crystal (22), the director (26) of the liquid crystal (22) assuming a field-off state tilted about 1-3 degrees from the perpendicular toward an azimuthal direction (30) parallel to the direction of movement of the substrate (20) during deposition.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.