To effectively remove with easy work a thin film composing of a metal or a metal compd. on a substrate of a glass, a ceramic or the like.
In a method removing a thin film, which composes of a metal or its compd. coated on a surface of a glass, a ceramic substrate, an acidic sulfate is brought into contact with a desired removing part of the thin film and the acidic sulfate is molten together with the thin film by heating at a higher temp. than an m.p. of the acidic sulfate, and after cooling it, the thin film is removed by washing the desired part. The metal is pref. to be selected among at least one kind of titanium, silicon, aluminum, zirconium, tin, cobalt, iron, chromium, manganese, copper and nickel, and their compd. is pref. to be an oxide, a nitride, carbide or their complex.
MAEKAWA TAKESHI
TSUJII YOSHIAKI
