摘要:
Provided are a nonvolatile memory and related method of programming same. The nonvolatile memory includes a memory cell array with a plurality of nonvolatile memory cells and a write circuit. The write circuit is configured to write first logic state data to a first group of memory cells during a first program operation using an internally generated step-up voltage, and second logic state data to a second group of memory cells during a second program operation using an externally supplied step-up voltage.
摘要:
A phase-change random access memory device is provided. The phase-change random access memory device includes a global bit line connected to a write circuit and a read circuit, multiple local bit lines, each being connected to multiple phase-change memory cells, and multiple column select transistors selectively connecting the global bit line with each of the multiple local bit lines, each column select transistor having a resistance that varies depending on its distance from the write circuit and the read circuit.
摘要:
A method programs a phase change memory device. The method comprises receiving program data for selected memory cells; generating bias voltages based on reference cells; sensing read data stored in a selected memory cell by supplying the selected memory cell with verification currents determined by the bias voltages; determining whether the read data is identical to the program data; and upon determining that the program data for one or more of the selected memory cells is not identical to the corresponding read data, iteratively applying a write current to the one or more selected memory cells.
摘要:
Apparatus and systems that use phase-change memory devices are provided. The phase-change memory devices may include multiple phase-change memory cells and a reset pulse generation circuit configured to output multiple sequential reset pulses. Each sequential reset pulse is output to a corresponding one of multiple reset lines. Multiple write driver circuits are coupled to corresponding phase change memory cells and to a corresponding one of the reset lines of the reset pulse generation circuit.
摘要:
A resistance semiconductor memory device of a three-dimensional stack structure, and a word line decoding method thereof, are provided. In the resistance semiconductor memory device of a three-dimensional stack structure, in which a plurality of word line layers and a plurality of bit line layers are disposed alternately and perpendicularly, and in which a plurality of memory cell layers are disposed between the word line layers and the bit line layers; the resistance semiconductor memory device includes a plurality of bit lines disposed on each of the bit line layers in a first direction as a length direction; a plurality of sub word lines disposed on each of the word line layers in a second direction as a length direction, intersected to the first direction; a plurality of memory cells disposed on the memory cell layers; and a plurality of main word lines individually disposed on a main word line layer specifically adapted over the bit line layers and the word line layers, in the second direction as a length direction, each one of the plurality of main word lines being shared by a predetermined number of sub word lines. An efficient word line decoding adequate to high integration can be achieved.
摘要:
A resistance semiconductor memory device of a three-dimensional stack structure, and a word line decoding method thereof, are provided. In the resistance semiconductor memory device of a three-dimensional stack structure, in which a plurality of word line layers and a plurality of bit line layers are disposed alternately and perpendicularly, and in which a plurality of memory cell layers are disposed between the word line layers and the bit line layers; the resistance semiconductor memory device includes a plurality of bit lines disposed on each of the bit line layers in a first direction as a length direction; a plurality of sub word lines disposed on each of the word line layers in a second direction as a length direction, intersected to the first direction; a plurality of memory cells disposed on the memory cell layers; and a plurality of main word lines individually disposed on a main word line layer specifically adapted over the bit line layers and the word line layers, in the second direction as a length direction, each one of the plurality of main word lines being shared by a predetermined number of sub word lines. An efficient word line decoding adequate to high integration can be achieved.
摘要:
A resistive memory device is provided. The resistive memory device includes word lines arranged in M rows, bit lines arranged in N columns, local source lines arranged in M/2 rows, and resistive memory cells arranged in M rows and N columns. Each of the resistive memory cells includes a resistance variable element having a first electrode connected to a corresponding bit line, and a cell transistor having a first terminal connected to a second electrode of the resistance variable element, a second terminal connected to a corresponding local source line, and a control terminal connected to a corresponding word line. The local source line is commonly connected to the second terminals of the cell transistors of the two neighboring rows.
摘要:
A magnetic memory device includes a common line; a first write-in diode, a readout diode and a second write-in diode being connected to the common line in parallel. The magnetic memory device further includes a magnetic tunnel junction structure connected to the readout diode, first and second write-in conductors disposed at both sides of the magnetic tunnel junction structure and connected to the first and second write-in diodes, respectively and a first write-in line, a readout line and a second write-in line, which are connected to the first write-in conductor, the magnetic tunnel injection structure, and the second write-in conductor, respectively.
摘要:
A nonvolatile memory device includes a stack-type memory cell array, a selection circuit and a read circuit. The memory cell array includes multiple memory cell layers and a reference cell layer, which are vertically laminated. Each of the memory cell layers includes multiple nonvolatile memory cells for storing data, and the reference cell layer includes multiple reference cells for storing reference data. The selection circuit selects a nonvolatile memory cell from the memory cell layers and at least one reference cell, corresponding to the selected nonvolatile memory cell, from the reference cell layer. The read circuit supplies a read bias to the selected nonvolatile memory cell and the selected reference cell corresponding to the selected nonvolatile memory cell, and reads data from the selected nonvolatile memory cell.
摘要:
A magnetoresistive random access memory (RAM) may include a plurality of variable resistance devices, a plurality of read bitlines electrically connected to respective variable resistance devices, and a plurality of write bitlines alternating with the read bitlines. The magnetoresistive RAM may be configured to apply a first write current through a first write bitline adjacent to a first variable resistance device when writing a first data to the first variable resistance device, and apply a first inhibition current through a second write bitline adjacent to a second variable resistance device, the second variable resistance device being adjacent to the first write bitline, and between the first write bitline and the second write bitline, and the first write current and the first inhibition current flowing in a same direction.