Patent ID: 6342412
Filing Date: 2002-01-29
Classification: G03F,H01L,Y10S

Abstract:
A method of fabricating a semiconductor integrated circuit device, comprising:forming an insulating film over a main surface of a semiconductor substrate; forming wiring lines, including uppermost wiring lines, over said insulating film, said uppermost wiring lines being arranged in parallel with each other with a gap between adjacent uppermost wiring lines; forming a silicon oxide film over said wiring lines and in gaps between adjacent uppermost wiring lines; and forming a silicon nitride film over said silicon oxide film, said silicon nitride film being formed by plasma chemical vapor deposition, wherein said silicon oxide film is formed to have a thickness of at least one-half of said gap between said adjacent uppermost wiring lines, such that said silicon oxide film has a substantially flat surface over which said silicon nitride film is formed, and wherein the silicon nitride film is thicker than said silicon oxide film.