Method of forming corrosion resistant film on the surface of substrate composed of copper or copper alloy

摘要

A method of forming a corrosion resistant film for a specified image on the surface of a substrate by adding an aliphatic amine such as ethylenediamine, monoethanolamine, diethanolamine, triethanolamine to a sensitizing solution composed of watersoluble high molecular compound and ammonium dichromate so as to adjust pH value of the sensitizing solution in the range of 6.1 to 7.8, applying the prepared sensitizing solution to the surface of a substrate of copper or copper alloy, and undergoing each process of drying, exposure and development. After an etching process being applied to the substrate on the surface of which the corrosion resistant film has been formed, the corrosion resistant film is removed to be a finished goods.