Patent ID: 6383857
Filing Date: 2002-05-07
Classification: H01L

Abstract:
A method for manufacturing a semiconductor device comprising the steps of:forming an oxide film on a semiconductor substrate; forming a wiring layer on said oxide film; forming a nitride film top wall layer on said wiring layer; forming wiring patterns and nitride film top walls by shaping said wiring layer and said nitride film top wall layer into suitable wiring pattern shape; forming nitride film side walls laterally to said wiring patterns and to said nitride film top walls; after depositing an interlayer oxide film, forming contact holes interposingly between said wiring patterns so that said nitride film top walls and said nitride film side walls will remain and that a side edge surface of said oxide film will be retracted from a frontal edge of the corresponding nitride film side wall into the corresponding wiring pattern; and forming contacts inside said contact holes.