Patent ID: 7416937

Claim:
A method for fabricating a semiconductor device, comprising the steps of: forming a trench having a predetermined depth by etching an inactive region of the semiconductor substrate so as to divide the device into an active region and the inactive region; forming a first storage electrode pattern on a bottom surface of the trench; filling a lower space of the trench with a storage dielectric film such that a surface of the first storage electrode pattern is exposed but at least a portion of sides of the first storage electrode pattern are covered by the storage dielectric film; forming a second storage electrode pattern at an upper part of the storage dielectric film and the first storage electrode pattern, the second storage electrode pattern covering an etch surface on an active region side of the trench and configured to electrically connect the first storage electrode pattern with a transistor; filling a remaining space of the trench with a device separating film; and forming a transistor in the active region of the semiconductor substrate so as to be electrically connected with the second storage electrode pattern via the etch surface on the side of the active region of the trench.