INDIUM BASED OXIDE FINE PARTICLE, METHOD OF PRODUCING THE FINE PARTICLE, COATING SOLUTION FOR FORMING TRANSPARENT ELECTRICALLY CONDUCTIVE FILM CONTAINING THE FINE PARTICLE, BASE MATERIAL WITH TRANSPARENT ELECTRICALLY CONDUCTIVE FILM AND DISPLAY

PROBLEM TO BE SOLVED: To provide indium based oxide fine particles which can provide a transparent electrically conductive film densely charged with the fine particle because of the spherical shape thereof, and can suitably be used, e.g. for a base material with a transparent electrically conductive film having electric conductivity, film strength, durability or the like, and to provide a method of producing the fine particles. SOLUTION: The indium based oxide fine particles have a mean particle diameter in the range of 2 to 200 nm, and have a substantially spherical particle shape. In the method of producing the indium based oxide fine particles, the pH of an indium hydroxide dispersed solution or a tin and/or fluorine compound- containing indium hydroxide dispersed solution (hereinafter referred to as an indium based hydroxide dispersed solution) is adjusted to 7 to 10 in the case that the concentration of the dispersed solution is 4 wt.% expressed in terms of oxide, and, after that, heat-treatment is performed. COPYRIGHT: (C)2003,JPO