Patent ID: 6495466
Filing Date: 2002-12-17
Classification: H01L

Abstract:
A method of manufacturing a semiconductor device comprising steps of:(a) successively depositing, over a base having a conductive layer formed thereon, a first insulating film, a second insulating film, and a hard mask; (b) forming a resist pattern over the hard mask; (c) etching the hard mask in the presence of the resist pattern, for transferring the pattern of the resist pattern to the hard mask; (d) removing the resist pattern; (e) etching the second insulating film in the presence of the hard mask and wherein the first insulating film serves as an etching stopper layer of the second insulating film, for selectively transferring the pattern of the hard mask to the second insulating film; and (f) etching the first insulating film in the presence of the hard mask, for transferring the pattern of the hard mask to the first insulating film, wherein the first insulating film is an organic-functional-group-containing insulating film having a lower dielectric constant than a silicon oxide film and wherein the second insulating film has a lower dielectric constant than a silicon nitride film.