Patent ID: 6777091
Filing Date: 2004-08-17
Classification: C03C,C23C,Y10T

Abstract:
A substrate with photocatalytic film comprising a substrate and a photocatalytic film coated on the substrate,wherein said photocatalytic film contains titanium oxide as a primary component, in the case that a sheet resistance of the photocatalytic film after coating is more than 1013 &OHgr;/&square;, said photocatalytic film is subjected to heat treatment in an inert or reducing atmosphere so that the oxygen deficiency in the photocatalytic film is increased, and in the case that a sheet resistance of the photocatalytic film after coating is less than 109 &OHgr;/&square;, said photocatalytic film is subjected to heat treatment in an oxidizing atmosphere so that the oxygen deficiency in the photocatalytic film is decreased, thereby said photocatalytic film has a sheet resistance of 109 to 1013 &OHgr;/&square;, and wherein said inert atmosphere is a rare gas atmosphere, or a vacuumed atmosphere; the reducing atmosphere is an atmosphere containing hydrogen gas; and said oxidizing atmosphere is an oxygen containing atmosphere such as air containing atmosphere or ozone containing atmosphere, and wherein niobium oxide film or nickel oxide film is provided as an underlying film between the substrate and the photocatalytic film.