Process for manufacturing liquid crystal device substrates
US5328728A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 21, 1992 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Dec 21, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49002
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A process for manufacturing a substrate (12) used in a device (10) for containing a liquid crystal fluid (30) between two spaced electrodes. A plurality of spacers (35) is distributed on a first surface of a substrate by coating the first surface with an admixture of spacers dispersed in a liquid (36). The admixture is agitated during the applications step in order to maintain a uniform dispersion of the spacers in the liquid. The liquid is then evaporated from the substrate surface, leaving a plurality of spacers distributed on the substrate. Preferably, an ester alcohol dispersant is employed in the admixture in order to facilitate dispersion of the spacers in the liquid. Ultrasonics are preferred as the means of agitating the admixture during application. Ultrasonic energy can also be applied to the substrate during application of the admixture to the substrate. Ultrasonic energy can also be applied to the admixture at the point of application (44) of the admixture onto the substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.