Patent ID: 7205193

Claim:
A semiconductor device comprising: a first conductive type semiconductor substrate having an active region and a field region defined thereon, and a trench formed in the field region; a storage dielectric film on an inside surface of the trench; a first storage electrode of a capacitor in the trench having the dielectric film formed therein; a protective film on the first storage electrode; a second conductive type epitaxial layer on an entire surface of the first conductive type semiconductor substrate; an active cell isolation film in the field region of the second conductive type epitaxial layer; a transistor on the second conductive type epitaxial layer in the active region, the transistor having a source and/or drain region; an open trench formed by selectively removing the second conductive type epitaxial layer adjacent to the active cell isolation film and the protective film; and a second storage electrode in the open trench configured to connect the source and/or drain region of the transistor and the first storage electrode.