Patent ID: 6951781

Claim:
A method for manufacturing a semiconductor device, comprising: forming a first metal wiring and a fuse above a semiconductor substrate; depositing a first insulating film above said semiconductor substrate to cover said first metal wiring and said fuse; selectively etching said first insulating film deposited on said first metal wiring to form a first pad opening; selectively forming a second metal wiring to contact with said first metal wiring through said first pad opening; forming a stopper film on said first insulating film and on said second metal wiring; forming a second insulating film above said stopper film; selectively etching parts of said second insulating film which correspond to a portion of said second metal wiring and to at least a portion of said fuse, thereby exposing a part of said stopper film; and etching away said part of said stopper film that has been exposed by the selective etching of said second insulating film, the etching of said stopper film comprising over-etching said stopper film to etch away part of said first insulating film which is located below said stopper film.