METHOD OF MANUFACTURING SHADOW MASK

摘要

A method of manufacturing a shadow mask having apertures of precise shape and size, comprises the steps of forming an etching-protective film having a pattern of a number of apertures on a surface of a thin metal plate containing iron and nickel as major components, and etching the thin metal plate using an etching solution with a viscosity of 1 to 5 centipoise (cP) so as to form a number of apertures therein.