Patent ID: 9183939
Filing Date: 2015-11-10
Classification: G11C

Abstract:
1. A method of reading a nonvolatile memory device which includes at least one string connected to a bit line, the at least one string including a plurality of memory cells connected in series, each of the plurality of memory cells being connected to respective word line of a plurality of word lines and stacked in a direction perpendicular to a substrate, comprising: applying a read voltage to a selected wordline of the nonvolatile memory device; applying a read pass voltage to unselected wordlines of the nonvolatile memory device; sensing a state of a memory cell connected to the selected wordline; applying the read pass voltage to the selected wordline after the sensing; and discharging the read pass voltage of at least one of the unselected wordlines while the read pass voltage is applied to the selected wordline.