Liquid crystal cell and its manufacturing method
US5861932A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Mar 30, 1998 |
| Grant date | Jan 19, 1999 |
| Priority date | — |
| Expiry date | Mar 30, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133345
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A pair of electrode panels are supported by plural spacer walls made of photo-resist resin to form a cell gap between electrode panels. The cell gap is filled with liquid crystal, preferably, antiferroelectric liquid crystal. The spacer walls are formed on an orientation layer formed on either panel. A thin layer is also formed on the orientation layer together with formation of the spacer walls as a residual layer. The residual layer has to be sufficiently thin not to disturb orientation of the liquid crystal and to attain a sufficiently high display contrast. The thickness of the residual layer is indirectly detected by an X-ray electron spectroscopy for chemical analysis (ESCA), and the residual layer is made sufficiently thin by setting a temperature of a preliminary baking process, which is carried out before formation of the spacer walls, in a proper range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.