Patent ID: 6838341

Claim:
A method for fabricating a semiconductor device, comprising: preparing a semiconductor substrate having a contact pad; forming a first insulating film having a storage node contact exposing the contact pad and having a stack structure of an upper interlayer insulating film, a bottom interlayer insulating film, and an etching stopper that is between the upper and bottom interlayer insulating films and that protrudes into the storage node contact; forming a first conductive film for a storage node on the substrate; forming a second insulating film with a recessed portion corresponding to a surface of the storage node contact; forming an etching mask layer on the recessed portion; etching the second insulating film using the etching mask layer; forming a second conductive film for a storage node on the substrate; etching the first and second conductive films to isolate nodes; and removing the etching mask layer, the second insulating film, and the upper interlayer insulating film.