Patent ID: 11908501
Assignee: KIOXIA CORPORATION
Field: Computer technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 0:
1. A storage device comprising:
a first interconnection extending in a first direction;
a second interconnection extending in a second direction crossing the first direction;
a memory cell connected between the first interconnection and the second interconnection and including a variable resistance memory element and a switching element that is connected in series to the variable resistance memory element between first and second ends of the memory cell respectively connected to the first and second interconnections; and
a control circuit configured to exercise control of a read operation to read data stored in the memory cell, wherein
the control circuit exercises the control of the read operation in such a manner as:
to set the first interconnection which has been charged with a first voltage and the second interconnection which has been charged with a second voltage into floating states,
after the first and second interconnections have been set into the floating states, to set the switching element into an on-state by discharging the second interconnection to thereby increase a voltage applied to the memory cell, and
to read the data stored in the memory cell by sensing a hold current that constantly passes through the memory cell in a state in which the switching element is set into the on-state and after a voltage applied across the memory cell decreases from a threshold voltage at which the switching element transitions into the on-state to a hold voltage lower than the threshold voltage.