摘要:
A method of operating a nonvolatile memory device may include applying a first voltage greater than a ground voltage to a selected word line during a first time period; applying a second voltage to an unselected word line during a second time period that is later than the first time period; and applying a third voltage greater than the first voltage and the second voltage to the selected word line during the second time period. The second time period includes a third time period during which a voltage level of the unselected word line increases to the second voltage from a fourth voltage that is less than the second voltage, and during which a voltage level of the selected word line increases to the third voltage from the first voltage.
摘要:
In a method of programming in a nonvolatile memory device, channels of a plurality of cell strings are precharged through ground selection transistors by a precharge voltage of a source line. A turn-on voltage is applied to a selected ground selection transistor of a selected cell string among the plurality of cell strings, during a verification read period of an N-th program loop. The turn-on voltage applied to the selected ground selection transistor is maintained to precharge the channels for an (N+1)-th program loop, without recovery after the verification read period of the N-th program loop is finished. Power consumption is reduced and an operation speed is increased by maintaining the turn-on voltage of the selected ground selection line to precharge the channels of the cell strings without recovery after the verification read operation is finished.
摘要:
A method of operating a nonvolatile memory device is provided where the nonvolatile memory device includes a plurality of cell strings, and each cell string includes a plurality of multi-level cells. a voltage of a selected word line is sequentially changed to sequentially have a plurality of read voltages for determining threshold voltage states of the plurality of multi-level cells. A voltage of an adjacent word line adjacent to the selected word line is sequentially changed in synchronization with voltage changing time points of the selected word line. A load of the selected word line is reduced and an operation speed of the nonvolatile memory device is increased by synchronizing the voltage change of the selected word line and the voltage change of the adjacent word line in the same direction.
摘要:
A non-volatile memory device includes a first word line, a second word line, first memory cells, second memory cells, and an address decoder. The second word line is adjacent to the first word line. The first memory cells are connected to the first word line. The second memory cells are connected to the second word line. The second memory cells are connected to the first memory cells, respectively. The address decoder applies a first voltage to the first word line and applies a second voltage to the second word line in an over program period of the first memory cells. The first voltage is higher than a program voltage of the first and second memory cells. The second voltage is lower than a pass voltage of the first and second memory cells.
摘要:
A page buffer comprises a static latch configured to store data received from an external device, and a dynamic latch configured to receive the data stored in the static latch through a floating node, the dynamic latch comprising a storage capacitor, a write transistor configured to write the data of the floating node to the storage capacitor, and a read transistor configured to read the data of the storage capacitor, and the write transistor and the read transistor sharing the floating node.
摘要:
A semiconductor memory device configured to apply a temperature-compensated word line voltage to a word line during a data read operation includes a memory cell array including a plurality of word lines, a plurality of non-volatile memory cells connected to the word lines, and a word line voltage application unit configured to apply a temperature-compensated read voltage to a selected word line and to apply a temperature-compensated pass voltage to at least one unselected word line during a read operation.
摘要:
Nonvolatile memory device includes memory cell region including a first metal pad and a second metal pad, peripheral circuit region including a third metal pad and a fourth metal pad, vertically connected to the memory cell region. The nonvolatile memory device includes a page buffer circuit including page buffers to sense data from selected memory cells, each including two sequential sensing operations to determine one data state, and each of the page buffers including a latch to sequentially store results of the two sequential sensing operations. The nonvolatile memory device includes control circuit in the peripheral circuit region, to control the page buffers to store result of the first read operation, reset the latches after completion of the first read operation, and control the page buffers to perform the second read operation based on a valley determined based on the result of the first read operation.
摘要:
A memory device includes an array of vertical NAND strings of nonvolatile memory cells, on an underlying substrate. An erase control circuit is provided, which is configured to drive a plurality of bit lines electrically coupled to the array of vertical NAND strings of nonvolatile memory cells with respective erase voltages having unequal magnitudes during an operation to erase the nonvolatile memory cells in the array of vertical NAND strings. This erase control circuit may also be configured to drive a first of the plurality of bit lines with a first erase voltage for a first duration and drive a second of the plurality of bit lines with a second erase voltage for a second duration unequal to the first duration during the operation to erase the nonvolatile memory cells in the array of vertical NAND strings.
摘要:
Nonvolatile memory device includes a memory cell array including pages, each of the pages including memory cells storing data bits, each of the data bits being selectable by a different threshold voltage, a page buffer circuit coupled to the memory cell array through bit-lines, the page buffer circuit including page buffers to sense data from selected memory cells, and perform a first read operation and a second read operation, each including two sequential sensing operations to determine one data state, and each of the page buffers including a latch configured to sequentially store results of the two sequential sensing operations, and a control circuit to control the page buffers to store a result of the first read operation, reset the latches after completion of the first read operation, and perform the second read operation based on a valley determined based on the result of the first read operation.
摘要:
A nonvolatile memory device and a method of programming the nonvolatile semiconductor memory device are disclosed. The programming method includes applying a first voltage greater than a ground voltage to a selected word line at a first time; applying a second voltage greater than the first voltage to the selected word line at a second time that occurs after a predetermined period from the first time; applying the ground voltage to a first unselected word line directly adjacent to the selected word line at the first time; and applying a third voltage greater than the ground voltage to the first unselected word line at the second time.