Abstract:
Disclosed is a nonvolatile memory device, which includes a memory cell array including cell strings, a row decoder connected with a ground selection transistor of each of the cell strings through a ground selection line, connected with memory cells of each of the cell strings through word lines, and connected with a string selection transistor of each of the cell strings through a string selection line, and a page buffer connected with the cell strings through bit lines. In a first period of a check operation, the page buffer applies a first bias voltage to the bit lines, and the row decoder applies a turn-off voltage to the ground selection line, a turn-on voltage to the string selection line, and a first check voltage to the word lines. In a second period of the check operation, the page buffer senses first changes of voltages of the bit lines.
Abstract:
An operating method of a nonvolatile memory device includes determining whether a memory block is a selected block, and when the memory block is not the selected block, determining whether the memory block shares a block word line with the selected block. The method further includes applying an unselected block word line voltage to word lines of the memory block when the memory block shares the block word line with the selected block, and floating the word lines of the memory block when the memory block does not share the block word line with the selected block.