摘要:
Methods are provided for operating a magnetic random access memory device including a memory cell having a magnetic tunnel junction structure on a substrate. In particular, a writing current pulse may be provided through the magnetic tunnel junction structure, and a writing magnetic field pulse may be provided through the magnetic tunnel junction structure. In addition, at least a portion of the writing magnetic field pulse may be overlapping in time with respect to at least a portion of the writing current pulse, and at least a portion of the writing current pulse and/or at least a portion of the writing magnetic field pulse may be non-overlapping in time with respect to the other. Related devices are also discussed.
摘要:
A magnetic random access memory device may include a first electrode on a substrate, a magnetic tunneling junction element electrically connected to the electrode, and a second electrode electrically connected to the first electrode through the magnetic tunneling junction element. In addition, a heat generating layer may be electrically connected in series between the first and second electrodes, and the heat generating layer may provide a relatively high resistance with respect to electrical current flow. Related methods are also discussed.
摘要:
Twin cell type semiconductor memory devices are provided that include a plurality of main bit lines and a plurality of reference bit lines. Each of the reference bit lines correspond to respective ones of the main bit lines to form a plurality of bit line pairs. A plurality of sense amplifiers are provided that are electrically connected to a respective one of the plurality of bit line pairs. At least one of the plurality of main bit lines or the plurality of reference bit lines is interposed between the main bit line and the corresponding reference bit line of each bit line pair. At least some of the main bit lines may cross respective ones of the reference bit lines in a sense amplifier region of the semiconductor memory device that contains the plurality of sense amplifiers.
摘要:
Magnetic RAM cells have split sub-digit lines surrounded by cladding layers and methods of fabricating the same are provided. The magnetic RAM cells include first and second sub-digit lines formed over a semiconductor substrate. Only a bottom surface and an outer sidewall of the first sub-digit line are covered with a first cladding layer pattern. In addition, only a bottom surface and an outer sidewall of the second sub-digit line are covered with a second cladding layer pattern. The outer sidewall of the first sub-digit line is located distal from the second sub-digit line and the outer sidewall of the second sub-digit line is located distal the first sub-digit line. Methods of fabricating the magnetic RAM cells are also provided.
摘要:
In an embodiment, a phase change memory device includes a semiconductor substrate of a first conductivity type and a first interlayer insulating layer disposed on the semiconductor substrate. A hole penetrates the first interlayer insulating layer. A first and a second semiconductor pattern are sequentially stacked in a lower region of the hole. A cell electrode is provided on the second semiconductor pattern. The cell electrode has a lower surface than a top surface of the first interlayer insulating layer. A confined phase change material pattern fills the hole on the cell electrode. An upper electrode is disposed on the phase change material pattern. The phase change material pattern in the hole is self-aligned with the first and second semiconductor patterns by the hole. A method of fabricating the phase change memory device is also provided.
摘要:
Nonvolatile memory devices are provided. Devices include active regions that may be defined by device isolation layers formed on a semiconductor substrate and extend in a first direction. Devices may also include word lines that may cross over the active regions and extend in a second direction intersecting the first direction. The active regions have a first pitch and the word lines have a second pitch that is greater than the first pitch.
摘要:
Integrated circuit devices are provide having a vertical diode therein. The devices include an integrated circuit substrate and an insulating layer on the integrated circuit substrate. A contact hole penetrates the insulating layer. A vertical diode is in lower region of the contact hole and a bottom electrode in the contact hole has a bottom surface on a top surface of the vertical diode. The bottom electrode is self-aligned with the vertical diode. A top surface area of the bottom electrode is less than a horizontal section area of the contact hole. Methods of forming the integrated circuit devices and phase change memory cells are also provided.
摘要:
Twin cell type semiconductor memory devices are provided that include a plurality of main bit lines and a plurality of reference bit lines. Each of the reference bit lines correspond to respective ones of the main bit lines to form a plurality of bit line pairs. A plurality of sense amplifiers are provided that are electrically connected to a respective one of the plurality of bit line pairs. At least one of the plurality of main bit lines or the plurality of reference bit lines is interposed between the main bit line and the corresponding reference bit line of each bit line pair. At least some of the main bit lines may cross respective ones of the reference bit lines in a sense amplifier region of the semiconductor memory device that contains the plurality of sense amplifiers.
摘要:
An exemplary embodiment of a magnetic random access memory (MRAM) device includes a magnetic tunnel junction having a free layer, a first electrode (first magnetic field generating means) having a first portion that covers a surface of the free layer, and an electric power source connected to the first electrode via a connection that covers less than half of the first portion of the first electrode. Another exemplary embodiment of an MRAM device includes a magnetic tunnel junction, first and second electrodes (first and second magnetic field generating means) directly connected to the magnetic tunnel junction on opposite sides of the magnetic tunnel junction, and an electric power source having one pole connected to the first electrode via a first connection and having a second pole connected to the second electrode via a second connection, wherein the first and second connections are laterally offset from the connections between the first and second electrodes and the magnetic tunnel junction. Methods of operating and manufacturing these magnetic random access memories are also disclosed.
摘要:
Integrated circuit devices are provide having a vertical diode therein. The devices include an integrated circuit substrate and an insulating layer on the integrated circuit substrate. A contact hole penetrates the insulating layer. A vertical diode is in lower region of the contact hole and a bottom electrode in the contact hole has a bottom surface on a top surface of the vertical diode. The bottom electrode is self-aligned with the vertical diode. A top surface area of the bottom electrode is less than a horizontal section area of the contact hole. Methods of forming the integrated circuit devices and phase change memory cells are also provided.