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

Claim 14:
15. A method of performing a write operation in a variable resistance nonvolatile memory including
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 word line that extends in a second direction orthogonal to the first direction and is in contact with the first insulator layer,
a second memory cell including a second word line that is located above the first word line, extends in the second direction, and is in contact with the first insulator layer, and
a bit line connected to the first and second memory cells, said method comprising:
applying a first voltage to the second word line and a second voltage to the bit line, when a write operation is performed on the first memory cell, and
applying a third voltage to the first word line and a fourth voltage to the bit line, when a write operation is performed on the second memory cell, wherein
the first voltage and third voltage are the same voltage and the second voltage and fourth voltage are different voltages, or the first voltage and third voltage are different voltages and the second voltage and fourth voltage are the same voltage.