Patent ID: 7119014

Claim:
A method for fabricating a semiconductor device comprising, in consecutive order: depositing a metallic conductive film on an underlying insulating film; consecutively depositing first and second insulator films on said metallic conductive film; patterning said first and second insulator films to have a substantially same patterned area; etching said second insulator film selectively from said first insulator film to configure said second insulator film to have a bottom with a width smaller than a width of said first insulator film; patterning said metallic conductive film by using said first and second insulator films as an etching mask; subsequently depositing a third insulator film on said first insulator film, said etched second insulator film, and said underlying insulating film; etching-back said third insulator film to configure a side-wall film covering at least said patterned metallic conductive film; and depositing a fourth insulator film to embed therein said side-wall film on said underlying insulating film.