摘要:
Disclosed are a non-volatile memory device and a method of programming the same. The method comprises applying a wordline voltage, a bitline voltage, and a bulk voltage to a memory cell during a plurality of program loops. In cases where the bitline voltage falls below a first predetermined detection voltage during a current program loop, or the bulk voltage becomes higher than a second predetermined detection voltage, the same wordline voltage is used in the current programming loop and a next program loop following the current program loop. Otherwise, the wordline voltage is incremented by a predetermined amount before the next programming loop.
摘要:
Disclosed is a non-volatile memory device and a method of programming the same. The non-volatile memory device comprises a plurality of memory cells that are programmed by supplying first and second program voltages thereto. In cases where the second program voltage rises above a predetermined detection voltage, the first program voltage is prevented from being supplied to the memory cell until the second program voltage falls below the detection voltage.
摘要:
A method for programming a flash memory device is provided, where the flash memory device includes a plurality of memory cells, and where a threshold voltage of each of the memory cells is programmable in any one of plural corresponding data states. The method includes programming selected memory cells in a first data state, verifying a result of the programming, successively programming selected memory cells in at least two or more data states corresponding to threshold voltages which are lower than a corresponding threshold voltage of the first data state, and verifying results of the successive programming
摘要:
Data verification methods and/or nonvolatile memory devices are provided that concurrently detect data for a selected memory cell of the nonvolatile memory device and verify a programmed or erase state of previously detected data of a different memory cell of the nonvolatile memory device. Concurrently detecting data and verifying a programmed or erase state may be provided by a sense amplifier configured to sense data from a memory cell of the nonvolatile memory device, a latch configured to store the data sensed by the sense amplifier, an I/O buffer configured to store the data stored in the latch and a program/erase verifier circuit configured to control the sense amplifier, latch and I/O buffer to provided previously sensed data for a first memory cell to the program erase/verifier circuit for verification while the sense amplifier is sensing data for a second memory cell.
摘要:
A method of programming a selected cell in a multi-level flash memory device comprises determining whether to program an upper bit or a lower bit of a selected memory cell, detecting a current logic state of two bits of data stored in the selected memory cell, determining a target logic state for the upper or lower bit, generating a program voltage and a verify voltage for programming the upper or lower bit to the target logic state, and applying the program voltage and the verify voltage to a word line connected to the selected memory cell.
摘要:
Disclosed is a non-volatile memory device and a method of erasing the non-volatile memory device. An erase voltage is simultaneously applied to a plurality of sectors contained in the non-volatile memory device. Then, erase validation is sequentially performed for each of the plurality sectors and results of the erase validation are stored in a plurality of pass information registers. According to the results stored in the pass information registers, sectors which were not successfully erased are simultaneously re-erased and then sequentially re-validated until no such “failed sectors” remain in the non-volatile memory device. Upon eliminating the “failed sectors” from the non-volatile memory device, a post-program operation is sequentially performed on each of the plurality of sectors.
摘要:
Disclosed is a non-volatile memory device and a method of programming the same. The non-volatile memory device comprises a plurality of memory cells that are programmed by supplying first and second program voltages thereto. In cases where the second program voltage rises above a predetermined detection voltage, the first program voltage is prevented from being supplied to the memory cell until the second program voltage falls below the detection voltage.
摘要:
A nonvolatile memory device includes a memory cell array, a data scanning unit, and a program unit. The memory cell array includes a plurality of memory cells, where each of the memory cells is programmable to store data have a first logic value or a second logic value. The data scanning unit is configured to search among a plurality of data to be programmed in the memory cells to identify data having the second logic value. The program unit is configured to group the identified data having the second logic value, and to program at least a portion of the group of identified data at a same time into the memory cells.
摘要:
The invention provides a method of programming in a nonvolatile semiconductor memory device, having a plurality of memory cell strings connected to a plurality of bitlines and constructed of a plurality of memory cell transistors whose gates are coupled to a plurality of wordlines, and a plurality of registers corresponding to the bitlines. The method involves applying a first voltage to a first one of the bitlines and applying a second voltage to a second one of the bitline, the first bitline being adjacent to the second bitline, the first and second voltages being supplied from the registers; electrically isolating the first and second bitlines from their corresponding registers; charging the first bitline up to a third voltage higher than the first voltage and lower than the second voltage; and applying a fourth voltage to a wordline after cutting off current paths into the first and second bitlines.
摘要:
The invention provides a method of programming in a nonvolatile semiconductor memory device, having a plurality of memory cell strings connected to a plurality of bitlines and constructed of a plurality of memory cell transistors whose gates are coupled to a plurality of wordlines, and a plurality of registers corresponding to the bitlines. The method involves applying a first voltage to a first one of the bitlines and applying a second voltage to a second one of the bitline, the first bitline being adjacent to the second bitline, the first and second voltages being supplied from the registers; electrically isolating the first and second bitlines from their corresponding registers; charging the first bitline up to a third voltage higher than the first voltage and lower than the second voltage; and applying a fourth voltage to a wordline after cutting off current paths into the first and second bitlines.