Patent ID: 8284588

Claim:
A method of operating a non-volatile logic circuit, comprising: a step (a) of preparing the non-volatile logic circuit, wherein: the non-volatile logic circuit comprises a control electrode, a ferroelectric layer, a semiconductor layer, and an electrode group, the control electrode, the ferroelectric layer, the semiconductor layer, and the electrode group are stacked in this order, the electrode group comprises a electric current power electrode, an output electrode, a first input electrode, and a second input electrode, X direction, Y-direction, and Z-direction denote a longitudinal direction of the ferroelectric layer, a direction orthogonal to the longitudinal direction, and a stacking direction, respectively, the first input electrode and the second input electrode are interposed between the electric current power electrode and the output electrode along the X-direction, and the first input electrode is next to the second input electrode along the Y-direction; a step (b) of writing one state selected from the group consisting of first, second, third, and fourth states into the non-volatile logic circuit, wherein: V 1 , Va, and Vb are voltages applied to the control electrode, the first input electrode, and the second input electrode, respectively, when the first state is written, voltages which satisfy V 1 >Va and V 1 >Vb are applied, when the second state is written, voltages which satisfy V 1 <Va and V 1 >Vb are applied, when the third state is written, voltages which satisfy V 1 >Va and V 1 <Vb are applied, when the fourth state is written, voltages which satisfy V 1 <Va and V 1 <Vb are applied, and the first, second and third states are low resistant states, and the fourth state is a high resistant state; and a step (c) of measuring current generated by applying a voltage between the electric current power electrode and the output electrode to determine on the basis of the current which of the high or low resistant state the non-volatile logic circuit has.