Patent ID: 7163886
Filing Date: 2007-01-16
Classification: H01L

Abstract:
1. A manufacturing process of a semiconductor device, comprising: (a) selectively forming a first insulating film on a surface of a semiconductor substrate; (b) forming a first conductor piece via a second insulating film over the surface of the semiconductor substrate; (c) forming a semiconductor layer in the semiconductor substrate in a region, in the surface of the semiconductor substrate, wherein the first insulating film and the first conductor piece do not exist; (d) forming a third insulating film to cover the first conductor piece, semiconductor layer and first insulating film, the third insulating film providing self-alignment during self-alignment processing; (e) forming a fourth insulating film over the third insulating film; (f) forming a first opening in the fourth and third insulating films, (g) forming a second conductor piece in the first opening; and (h) forming a fifth insulating film over the fourth insulating film, the fifth insulating film being a passivation insulating film, wherein the third and fifth insulating films are silicon nitride films formed by plasma CVD, wherein the fifth insulating film is formed using a silane, nitrogen and ammonia gas, while the third insulating film is formed using a silane and a nitrogen gas in an ammonia-free atmosphere, and wherein the third insulating film is formed at a temperature higher than that of the fifth insulating film.