Patent ID: 7889537
Filing Date: 2011-02-15
Classification: G11C,H01L

Abstract:
1. A method for writing data to a non-volatile memory device having first wirings and second wirings intersecting one another and memory cells arranged at each intersection therebetween, each of the memory cells having a variable resistive element and a rectifying element connected in series, the method comprising: charging the second wirings to a certain voltage not less than a rectifying-element threshold value, prior to a rise in a selected first wiring; charging the selected first wiring to a voltage required for writing or erasing; and discharging a selected second wiring, wherein after the selected second wiring is discharged, the selected second wiring is re-charged to the certain voltage, and wherein the time between discharging of the selected second wiring and re-charging of the selected second wiring to the certain voltage differs depending on data written in the selected memory cell.