Patent ID: 11972798
Assignee: KIOXIA CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G

Claim 8:
9. A variable resistance nonvolatile memory comprising:
a first memory cell including
a variable resistance layer that extends in a first direction above a semiconductor substrate,
a first semiconductor layer that extends in the first direction and is in contact with the variable resistance layer,
a first insulator layer that extends in the first direction and is in contact with the first semiconductor layer, and
a first voltage applying electrode that extends in a second direction orthogonal to the first direction and is in contact with the first insulator layer; and

a second memory cell including a second voltage applying electrode that is located above the first voltage applying electrode, extends in the second direction, and is in contact with the first insulator layer;
a second semiconductor layer that extends in the first direction;
a second insulator layer that extends in the first direction and is in contact with the second semiconductor layer;
a select transistor including a third voltage applying electrode that extends in the second direction and is in contact with the second insulator layer;
a memory cell string that includes the select transistor and a plurality of memory cells including the first and second memory cells, which are connected in series in the first direction, wherein the select transistor is connected to a first end of the plurality of memory cells, and a fourth voltage applying electrode is connected to a second end of the plurality of memory cells; and
a fifth voltage applying electrode that is above and connected to the select transistor, and extends in a third direction orthogonal to the first direction and the second direction, wherein
when a write operation is performed on the first memory cell, a first voltage is applied to the fifth voltage applying electrode,
when a write operation is performed on the second memory cell, a second voltage that is lower than the first voltage, is applied to the fifth voltage applying electrode.