Photosensitive black composition and color filter

Abstract

The invention provides a light-sensitive black composition, containing (a) carbon black, (b) dispersant, (c) pigment derivatives, (d) photo-polymerization initiator, and (e) olefinic-bond unsaturated compound. The carbon black (a) has the average primary particle-size of 15 to 25nm, specific surface area of 100 to 180m<2> / g, and absorption capacity to dibutyl phthalate of less than 55cm<3> / 100g. The dispersant (b) is composed of phosphate esters pigment dispersant or specific acidic dispersant. The pigment derivatives (c) are composed of specific alkaline pigment derivatives.

Description

technical field [0001] The present invention relates to a photosensitive black composition for forming a black matrix constituting a color filter used in a liquid crystal display device or an imaging tube element, and a color filter including a black matrix formed of the photosensitive black composition. Background technique [0002] In a color filter, a grid-like matrix called a black matrix (hereinafter sometimes abbreviated as "BM") is generally formed between red (R), green (G), and blue (B) filter segments. black pattern. The function of this BM is to block the light from the backlight to improve contrast and prevent color mixing of adjacent RGB pixels. [0003] As a method of forming BM, there is a method of forming a metal thin film on a substrate by vapor deposition, sputtering, etc., using a metal such as chromium, and then finely patterning the metal thin film by photolithography and etching ( Metal BM method), and a photosensitive black composition formed by dis...

AI Technical Summary

Problems solved by technology

As a result, even if the content is the same, the filling property will change depending on the type and dispersibility of carbon black, resulting in different results in light-shielding properties

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