Patent ID: 7772082

Claim:
A method of fabricating a capacitor of a semiconductor device, the method comprising: forming a buffer insulating film over a semiconductor substrate including conductive patterns; etching the buffer insulating film using a storage node mask to form a buffer insulating pattern exposing one of the conductive patterns, the buffer insulating pattern defining a first storage node region wider than a second storage node region; forming an etch stop film over the conductive patterns and the buffer insulating pattern; forming an interlayer insulating film over the etch stop film; etching the interlayer insulating film using the storage node mask to expose the etch stop film thereby forming the second storage node region; removing the exposed etch stop film to expose the conductive patterns on the bottom and both sidewalls of the buffer insulating pattern, thereby forming the first storage node region; and forming a lining lower storage node over the first and second storage node regions.