Patent ID: 9036398
Filing Date: 2015-05-19
Classification: G11C

Abstract:
1. A read method of a vertical resistance memory device includinq a plurality of resistance memory cells arranged in a three-dimensional array comprising: selecting a block from a plurality of blocks; applying a read voltage to a. word line selected from word lines of the block; applying a read-inhibition voltage to word lines unselected from the word lines of the block; applying a sensing reference voltage toe bit line selected from bit lines sharing the plurality of blocks; applying the read-inhibition voltage to bit lines unselected from the bit lines sharing the plurality of blocks; applying a string selection voltage to a string selection transistor through a string selection line selected from a plurality of string selection lines of the block, wherein the string selection line is connected to a gate of the string selection transistor; applying a ground voltage to string selection transistors through string selection lines unselected from the plurality of string selection lines of the block; and determining a memory state of a resistance memory cell selected from the plurality of resistance memory cells by the word line, the bit line and the string selection line based on an amount of current flowing through the resistance memory cell, wherein the word line is connected through a corresponding horizontal electrode to the resistance memory cell, wherein the plurality of resistance memory cells is connected between horizontal electrodes and vertical electrodes, wherein the horizontal electrodes are formed in XY planes and the vertical electrodes are formed in a direction perpendicular to the XY planes, and wherein the horizontal electrodes are connected to the word lines and the vertical electrodes are connected to the bit lines, wherein the read-inhibition voltage is half of the read voltage, wherein the sensing reference voltage is 0 V, wherein the ground voltage is applied to the selected string selection line during a predetermined time before the applying of the string selection voltage.