Pigment dispersion composition, photocurable composition and color filter

Abstract

There is provided a pigment dispersion composition having high pigment dispersibility and dispersion stability and favorable color characteristics even when containing a high concentration of pigment; a photocurable composition superior in developability and pixel surface smoothness, allowing high contrast; and a color filter having high contrast. A pigment dispersion composition containing a polymeric compound having a specific group or the like dissociated by an alkali is used.

Description

technical field [0001] The present invention relates to a pigment dispersion composition that can be used in imaging materials such as color filters and color proofs, and photocurable materials such as inks and paints; suitable for forming liquid crystal display devices and solid-state image pickup elements (solid-state image A photocurable composition for a color filter of a sensing device; a color filter using the photocurable composition; and a manufacturing method thereof. Background technique [0002] In recent years, the use of color filters in liquid crystal display devices (LCDs) has expanded beyond displays to include televisions and the like. Therefore, high-standard color characteristics are required in terms of chromaticity and contrast. Similarly, high-quality color characteristics such as reduction of color irregularities and improvement of color separation are required for use of image sensors (solid-state imaging elements). [0003] In response to the above...

AI Technical Summary

Problems solved by technology

If the dispersibility is insufficient, burrs (notches in the edges) and surface asperities are generated on the formed colored resist film, and in the color filter to be manufactured, such as a decrease in chromaticity and dimensional accuracy and a significant decrease in contrast occur. And other issues

If the dispersion stability is insufficient, the following problems are likely to occur in the manufacturing process of the color filter: the uniformity of the film thickness decreases in the coating process of the colored photocurable composition; the photosensitivity decreases in the exposure process. ; and decreased alkali solubility in the developing process

However, in the color filter manufactured in this way, there is a problem that, in the developing process, residues and smears tend to occur on the unexposed portion of the substrate or on the light-shielding layer, and the post-baking pixel after the development has its film coating Poor performance; for example, poor surface smoothness

In addition, the degree of residue and scum on the substrate or light-shielding layer and the degree of deterioration of surface smoothness tend to become more conspicuous as the concentration of the pigment contained in the photocurable composition increases. Difficulty obtaining sufficient color density in photocurable compositions

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