The invention relates to a coating solution for forming transparent
conductive tin oxide film, a method for producing transparent conductive
tin oxide film, and transparent conductive tin oxide film. The coating
solution is capable of forming, from an inexpensive starting material such
as tin oxide or tin chloride, strong tin oxide film endowed with excellent
conductivity and transparency. The coating solution, which is intended to
be used for forming, by way of coating, transparent conductive film
predominantly containing tin oxide, contains stannic acid as its major
component, and a water-soluble polymer having a polar group which is
dissolved in the presence of at least one compound selected from the group
consisting of ammonia and water-soluble amines.
