Patent ID: 8753987

Claim:
A method of manufacturing a metal oxide film to be formed through the following processes: a coating process of coating a substrate with a coating liquid for forming metal oxide film containing an organometallic compound as a main component to form a coating film; a drying process of drying the coating film to form a dried coating film; and a heating process of mineralizing the dried coating film to form an inorganic film having an inorganic component, which is a metal oxide, as a main component, wherein the heating process is a process of performing a heating treatment to elevate a temperature of the dried coating film, which has the organometallic compound as a main component and has been formed in the drying process, up to a temperature or higher at which at least mineralization of the organometallic compound components occurs, under an oxygen-containing atmosphere having a dew-point temperature equal to or lower than −10° C., and then removing an organic component contained in the dried coating film by thermal decomposition, burning, or thermal decomposition and burning, thereby forming a metal oxide fine-particle layer densely packed with metal oxide fine particles having a metal oxide as a main component, and the organometallic compound is formed of any one or more types of an organic aluminum compound, an organic silicon compound, an organic scandium compound, an organic titanium compound, an organic vanadium compound, an organic chromium compound, an organic manganese compound, an organic iron compound, an organic cobalt compound, an organic nickel compound, an organic copper compound, an organic gallium compound, an organic germanium compound, an organic yttrium compound, an organic zirconium compound, an organic niobium compound, an organic molybdenum compound, an organic ruthenium compound, an organic antimony compound, an organic lanthanum compound, an organic hafnium compound, an organic tantalum compound, an organic tungsten compound, an organic bismuth compound, an organic cerium compound, an organic neodymium compound, an organic samarium compound, an organic gadolinium compound, an organic magnesium compound, an organic calcium compound, an organic strontium compound, and an organic barium compound; and the metal oxide is any one or more types of aluminum oxide, silicon oxide, scandium oxide, titanium oxide, vanadium oxide, chromium oxide, manganese oxide, iron oxide, cobalt oxide, nickel oxide, copper oxide, gallium oxide, germanium oxide, yttrium oxide, zirconium oxide, niobium oxide, molybdenum oxide, ruthenium oxide, antimony oxide, lanthanum oxide, hafnium oxide, tantalum oxide, tungsten oxide, bismuth oxide, cerium oxide, neodymium oxide, samarium oxide, gadolinium oxide, magnesium oxide, calcium oxide, strontium oxide, and barium oxide.