Patent ID: 7109543

Claim:
A semiconductor device having a trench capacitor, the device comprising: a structure which includes a silicon substrate having a conductive well formed with a predetermined depth therein, a trench formed in the conductive well, a plate electrode formed in the sidewall of the trench, a capacitor insulating film deposited on the plate electrode, a storage node electrode having a U-shape on the capacitor insulating film, a first storage node connector formed on the end portions of the storage node electrode, and a first insulating film formed on the first storage node connector; a silicon layer formed on the surface of the substrate, including a hole exposing a portion of the first storage node connector via the first insulating film; word lines formed on the silicon layer; source and drain regions formed in the silicon layer at portions below both sides of the respective word lines; and a second storage node connector formed in the hole, connecting the source region to the first storage node connector.