摘要:
Memory devices and methods for operating a memory cell are disclosed, such as a method that uses two program verify levels (e.g., low program verify level and program verify level) to determine how a data line voltage should be increased. A threshold voltage of a memory cell that has been biased with a programming voltage is determined and its relationship with the two program verify levels is determined. If the threshold voltage is less than the low program verify level, the data line can be biased at a ground voltage (e.g., 0V) for a subsequent programming pulse. If the threshold voltage is greater than the program verify level, the data line can be biased at an inhibit voltage for a subsequent programming pulse. If the threshold voltage is between the two program verify levels, the data line voltage can be increased for each subsequent programming pulse in which the threshold voltage is between the two program verify levels.
摘要:
A programming method and memory structure for preventing punch-through in a short channel source-side select gate structure includes adjusting voltages on the selected and unselected bitlines, and the program, pass, and select gate voltages.
摘要:
A programming method of a nonvolatile memory device includes inputting even data and odd data to be programmed into even memory cells coupled to even bit lines and odd memory cells coupled to odd bit lines, respectively, setting a sense signal as a first sense signal or a second sense signal having a lower voltage level than the first sense signal, based on odd data of odd memory cells adjacent to each of the even memory cells to be programmed, programming the even data into the even memory cells by supplying a program voltage, performing a program verify operation on each of the even memory cells in response to the set sense signal, and programming the odd data into the odd memory cells by supplying a program voltage.
摘要:
A vertical channel type non-volatile memory device having a plurality of memory cells stacked along a channel includes the channel configured to be protruded from a substrate, a tunnel insulation layer configured to surround the channel, a plurality of floating gate electrodes and a plurality of control gate electrodes configured to be alternately stacked along the channel, and a charge blocking layer interposed between the plurality of the floating gate electrodes and the plurality of the control gate electrodes alternately stacked.
摘要:
A method of operating a semiconductor device includes programming selected memory cells by supplying a selected word line with a program voltage which increases and supplying the remaining unselected word lines with a first pass voltage which is substantially constant; and programming the selected memory cells while supplying first unselected word lines adjacent to the selected word line with a second pass voltage increasing in proportion to the program voltage, when a difference between the program voltage and the first pass voltage reaches a critical voltage difference.
摘要:
A method for operating a non-volatile memory device includes performing an erase operation onto a memory block including a plurality of memory cells, and performing a first soft program operation onto all the memory cells of a string, after the erase operation, grouping word lines of the string into a plurality of word line groups, and performing a second soft program operation onto memory cells coupled with the word lines of each word line group.
摘要:
A method for programming that biases a selected word line with a programming voltage. An unselected word line on the source side and an unselected word line on the drain side of the selected word line are biased at a pass voltage that is less than the normal pass voltage. These unselected word lines are both located a predetermined distance from the selected word line. The remaining word lines are biased at the normal pass voltage.
摘要:
A method of operating a semiconductor device according to an embodiment of the present invention includes programming selected memory cells by applying a first program voltage, which gradually rises, to a selected word line and applying a first pass voltage, which is constant, to remaining unselected word lines; and programming the selected memory cells while applying a second program voltage, which is constant, to the selected word line and applying a second pass voltage, which gradually rises, to first unselected word lines adjacent to the selected word line, when a difference between the first program voltage and the first pass voltage reaches a critical voltage difference.
摘要:
A semiconductor device is operated by, inter alia: programming selected memory cells by applying a first program voltage which is increased by a first step voltage to a selected word line and by applying a first pass voltage having a constant level to unselected word lines, and when a voltage difference between the first program voltage and the first pass voltage reaches a predetermined voltage difference, programming the selected memory cells by applying a second program voltage which is increased by a second step voltage lower than the first step voltage to the selected word line and by applying a second pass voltage which is increased in proportion to the second program voltage to first unselected word lines adjacent to the selected word line among the unselected word lines.
摘要:
A programming method of a non-volatile memory device that includes a string of memory cells with a plurality of floating gates and a plurality of control gates disposed alternately, wherein each of the memory cells includes one floating gate and two control gates disposed adjacent to the floating gate and two neighboring memory cells share one control gate. The programming method includes applying a first program voltage to a first control gate of a selected memory cell and a second program voltage that is higher than the first program voltage to a second control gate of the selected memory cell, and applying a first pass voltage to a third control gate disposed adjacent to the first control gate and a second pass voltage that is lower than the first pass voltage to a fourth control gate disposed adjacent to the second control gate.