Schwarze Harzmatrix für Flüssigkristallanzeigevorrichtung

摘要

A resin black matrix comprises a resin having dispersed in it a light-shading agent comprising carbon black. The carbon black has at least one of the following features (A) to (D): (A) a pH of 6.5 or less; (B) a carboxyl group concentration ÄCOOHÜ at the surface, as a molar ratio to total carbon atoms given by 0.001 < ÄCOOHÜ; (C) a hydroxyl group concentration ÄOHÜ at the surface, as a molar ratio to total carbon atoms given by 0.001 < ÄOHÜ; and (D) a sulfonic acid group concentration ÄSO3HÜ at the surface, as a molar ratio to total carbon atoms given by 0.001 <ÄSO3HÜ. The resin black matrix can be obtained by coating on a substrate a black paste comprising a light-shading agent dispersed in a resin or its precursor solution, which light-shading agent comprises carbon black having at least one of the above features (A) to (D). The black matrix may be employed in a color filter which is especially suitable for use in a liquid crystal display device.