Patent ID: 8767468

Claim:
A read method of a nonvolatile memory device, comprising: applying one of a plurality of unselected read voltages to unselected wordlines adjacent to a selected wordline based on which one of a plurality of selected read voltages applied to the selected wordline, wherein the applying one of the plurality of unselected read voltages to the unselected wordlines adjacent to the selected wordline includes, applying a first unselected read voltage to wordlines adjacent to the selected wordline if a first selected read voltage is applied to the selected wordline; applying a second unselected read voltage to the wordlines adjacent to the selected wordline if a second selected read voltage is applied to the selected wordline, the second unselected read voltage being a higher voltage than the first unselected read voltage; and applying the second unselected read voltage to the wordlines adjacent to the selected wordline if a third selected read voltage is applied to the selected wordline, wherein the third selected read voltage is higher than the second selected read voltage.