OXIDE COMPOSITE PARTICLE AND METHOD OF ITS MANUFACTURE, FLUORESCENT MATERIAL AND METHOD OF ITS MANUFACTURE, COLOR FILTER AND METHOD OF ITS MANUFACTURE, AND COLOR DISPLAY UNIT

摘要

PROBLEM TO BE SOLVED: To provide a fluorescent material or color filter excellent in optical character, heat resistance, and non-toxicity and never inhibiting irradiation of an ultra-violet ray to a photoresist, and a color display unit good in luminance chromaticity and excellent in luminance and contrast. SOLUTION: This oxide composite particle contains at least a gold minute particle in a oxide particle matrix, or at least a gold minute particle is carried and fixed on the surface of an oxide particle, and adsorbs a visible light of a selective wave length. This fluorescent material has a thin film comprising the oxide composite particle on the surface of the red, etc. fluorescent particle, and it can be obtained by mixing the fluorescent particle in a dispersion of a gold colloid and the oxide composite particle, stirring, then taking out, and drying the precipitated fluorescent particle. This color filter has filter layers formed inside a panel and at least one color filter layer is a thin film of the composite oxide particle.