Patent ID: 6818993
Filing Date: 2004-11-16
Classification: H01L,Y10S

Abstract:
A semiconductor device comprising:a semiconductor substrata having an uppermost insulating film; lamination of a first conductive film of metal or metal silicide, a first insulating film, and a second insulating film made of silicon nitride laminated in this order from a lower side, the lamination being formed on or above the uppermost insulating film, and having a same pattern defined with a pair of side walls; a pair of third insulating films formed on the pair of side walls of the lamination covering at least the first conductive film, the third insulating film being made of a same material as the first insulating film, and having a thickness smaller than that of the first insulating film; a pair of fourth insulating films formed on the pair of side walls of the lamination through said third insulating films, to be contiguous to said second insulating film, the second and the fourth insulating films collectively coveting the first conductive film; an interlevel insulating layer formed on or above said semiconductor substrate, covering said second and fourth insulating films; an aperture formed through said interlevel insulating layer, at least partially exposing one of said fourth insulating films; and a second conductive film filling the aperture.