Patent ID: 6093637
Filing Date: 2000-07-25
Classification: H01L

Abstract:
A method for forming a semiconductor device of a multi-layer interconnection structure comprising the steps of forming an insulating film overlying a semiconductor substrate, forming a first interconnect pattern on said insulating film, forming a first silicon oxide film on said first interconnect pattern and said insulating film by a dual-frequency plasma enhanced chemical vapor deposition (CVD) using a higher frequency component and a lower frequency component for plasma discharge and using a alkoxysilane as 2a reactive gas, said first silicon oxide film having a thickness lower than a thickness of said first interconnect pattern, forming a second silicon oxide film by an atmospheric pressure CVD process using a mixture of alkoxysilane and ozone as a reactive gas, forming a third silicon oxide film on said second silicon oxide film by a plasma enhanced CVD process, and forming a second interconnect pattern overlying said second silicon oxide film.