Patent ID: 7470585

Claim:
A method for fabricating an integrated circuit that includes a semiconductor device for storing charge, the device including at least one elementary active component and at least one elementary storage capacitor, said method comprising the steps of: preparing an initial single-crystal substrate such that a capacitive elementary trench emerges at the surface of the initial substrate and forms a discontinuity in the crystal lattice; recessing the initial substrate at the elementary trench; amorphizing the crystal lattice of the initial substrate around the periphery of the recess; depositing a layer of amorphous material having the same chemical composition as the initial substrate; thermally annealing the resulting structure in order to recrystallize the amorphous material so as to be continuous with the single-crystal lattice of the initial substrate; growing an upper substrate layer; and defining an elementary well at least in the upper substrate layer, the elementary well being located above and in contact with the capacitive elementary trench.