Polymer coated long duration optical memory device and a method for the development thereof
US6407797B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 1999 |
| Grant date | Jun 18, 2002 |
| Priority date | — |
| Expiry date | Nov 4, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02F1/133711
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
The invention relates to a method for the preparation of a polymer coated long duration optical memory device having applications in ferroelectric liquid crystal materials, the said method comprising the steps of forming patterns of different shapes and configurations on a glass substrate coated with indium tin oxide by lithographic methods to obtain an effective electrode area of at least 5 mm2; depositing an antireflection coating on external surfaces of glass substrates followed by coating the patterned glass substrate with a polymer selected from the polyamide group of nylon 6/6 and nylon 6/9 in the thickness range of 900 å-1100 å; baking the coated substrate followed by hard rubbing of the polymer coated surface; coating one of the substrates with a spacer selected from photoresist having thickness in the range of 1 &mgr;m to 3 &mgr;m; inserting a ferroelectric liquid crystal material in the space between the coated glass substrates, followed by sealing the sandwiched glass substrates at the periphery; heating and cooling the sandwiched glass substrates; fixing a polariser and an analyser on non conducting surface of each of the respective glass plates, followed by…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.