Patent ID: 7989287

Claim:
A method for fabricating a storage node electrode in a semiconductor device, the method comprising: forming an etch stop film over an interlayer dielectric film in which a contact plug is formed; performing a primary high density plasma (HDP) process to form a first HDP oxide film over the etch stop film; performing a secondary HDP process to form a second HDP oxide film on the first HDP oxide film, an etching rate of the second HDP oxide film being slower than an etching rate of the first HDP oxide film; forming a support film over the second HDP oxide film; performing a tertiary HDP process to form a third HDP oxide film over the support film; forming a storage node contact hole exposing the contact plug by patterning the third HDP oxide film to the first HDP oxide film; forming a storage node electrode on an exposed surface of the storage node contact hole; partially removing the third HDP oxide film and the support film so that a support pattern supporting the storage node electrode is formed; and exposing an outer surface of the storage node electrode by removing the second HDP oxide film and the first HDP oxide film.