BLACK MATERIAL, BLACK PARTICLE DISPERSION LIQUID, BLACK LIGHT-BLOCKING FILM USING SAME, AND BASE WITH BLACK LIGHT-BLOCKING FILM

摘要

Disclosed is a black material composed of particles mainly containing an Ag-Sn alloy which includes not less than 47.6% and not more than 90% by weight of Ag, and this black material is characterized in that the particles have an average particle diameter of not less than 1 nm and not more than 300 nm. Also disclosed is a black particle dispersion liquid characterized by containing the black material (particles) and a polyvinyl pyrrolidone (PVP) as a polymer dispersant. Further disclosed are black particles characterized in that the surfaces of the above-described particles are covered with an insulating film which is composed of a metal oxide such as silicon dioxide (silica) and aluminum oxide (alumina), or an organic polymer compound such as a polyamine compound.