Chemically amplified color resist composition
US6255032A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 22, 1999 |
| Grant date | Jul 3, 2001 |
| Priority date | — |
| Expiry date | Nov 22, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S430/115
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
An active matrix liquid crystal display (AMLCD) with improved pixel aperture and long term stability. It contains: (a) a substantially transparent substrate; (b) an array of thin film transistors (TFT) on the substrate; (c) a photo imageable color filter formed on the each of the TFTs. The photo imageable color filter contains: (i) a substantially transparent acrylic copolymer containing 1-15 mol % of carboxyl groups, 1-15 mol % of hydroxyl groups, 30-50 mol % tertiary butyl ester groups, and 5-20 mol % phenyl groups; (ii) an organic pigment; and (iii) a photo acid generator and a photo sensitizer. The acrylic copolymer allows the polymer molecules to fully extend and provides improved affinity with the color pigments, so as to allow improved long term stability of the color filters to be obtained by preventing the coagulation and/or precipitation of the pigment particles, which will cause the properties of the color filter, such as light transmissibility, color saturation, and color hue, to degrade.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.