Patent ID: 7282434

Claim:
A method of manufacturing a semiconductor integrated circuit device comprising the steps of: (a) forming a first insulating film comprised of fluorine-containing silicon oxide over a main surface of a semiconductor substrate; (b) forming a second insulating film comprising silicon oxide as a major component; (c) forming a third insulating film comprising silicon carbide as a major component, wherein the third insulating film is in contact with both said first insulating film and said second insulating film; (d) forming a fourth insulating film comprised of fluorine-containing silicon oxide; (e) removing the fourth insulating film at a wiring groove-forming region thereof by dry etching using a first photoresist film as a mask; and (f) forming first conductive layer buried inside the wiring groove and removing the first conductive layer from outside of the wiring groove by a chemical mechanical polishing method, thereby forming a first wiring including the first conductive layer inside the wiring groove.