Patent ID: 6210842
Filing Date: 2001-04-03
Classification: G03F

Abstract:
A method of fabricating a stencil mask comprising steps of:(a) preparing a mask substrate and forming a first silicon oxide film on a backside of said mask substrate;(b) forming a silicon nitride film on said first silicon oxide film;(c) etching outside of the silicon nitride film by a predetermined width to form a first silicon nitride pattern, said first silicon nitride pattern being larger than an opening area foreordinated to be formed on the backside of said mask substrate;(d) etching inside of said first silicon nitride pattern by the area corresponding to said opening area to form a second silicon nitride pattern;(e) etching inside of said first silicon oxide film until exposing said mask substrate by the area corresponding to said opening area to form a silicon oxide pattern; and(f) etching the backside of said mask substrate to form said opening using said second silicon nitride pattern and said silicon oxide pattern as an etching mask.