Thin ito films and method of producing the same

摘要

A novel thin ITO film formed on a substrate and containing Sn at a concentration of 0.6 to 2.8 atomic %. The thin ITO film can be used as a transparent electrically conducting film. A method of producing the thin ITO film includes a step of spraying a mixed solution of an indium salt and a tin salt onto a substrate left in the atmosphere. A stannous chloride is used as the tin salt and an alcohol solution is used as the solution. The thin ITO film of a low Sn concentration (0.6, 1.3 or 2.8 atomic %) exhibits a markedly decreased absorption coefficient in a long wavelength region (lambda≈500 to 1000 nm). The thin ITO film realizes a low resistivity (about 1.7x10^-4 Omega.cm).