Abstract:
Multi-level nonvolatile memory devices using variable resistive elements, the multi-level nonvolatile memory devices including a word line, a bit line, and a multi-level memory cell coupled between the word line and the bit line, the multi-level memory cell having first resistance level and a second resistance level higher than the first resistance level when the first and second write biases having the same polarity are applied thereto, and a third resistance level and a fourth resistance level ranging between the first and second resistance levels, when third and fourth write biases having different polarities from each other are applied thereto.
Abstract:
Methods of forming a resistive memory device include forming an insulation layer on a semiconductor substrate including a conductive pattern, forming a contact hole in the insulation layer to expose the conductive pattern, forming a lower electrode in the contact hole, forming a variable resistive oxide layer in the contact hole on the lower electrode, forming a middle electrode in the contact hole on the variable resistive oxide layer, forming a buffer oxide layer on the middle electrode and the insulation layer, and forming an upper electrode on the buffer oxide layer. Related resistive memory devices are also disclosed.
Abstract:
Provided is a semiconductor memory device. The semiconductor memory device may include a local bitline extending in a direction substantially vertical to an upper surface of a semiconductor substrate and a local wordline intersecting the local bitline. The local bitline is electrically connected to a bitline channel pillar penetrating a gate of a bitline transistor, and the local wordline is electrically connected to a wordline channel pillar penetrating a gate of a wordline transistor.
Abstract:
Methods of forming a resistive memory device include forming an insulation layer on a semiconductor substrate including a conductive pattern, forming a contact hole in the insulation layer to expose the conductive pattern, forming a lower electrode in the contact hole, forming a variable resistive oxide layer in the contact hole on the lower electrode, forming a middle electrode in the contact hole on the variable resistive oxide layer, forming a buffer oxide layer on the middle electrode and the insulation layer, and forming an upper electrode on the buffer oxide layer. Related resistive memory devices are also disclosed.
Abstract:
A semiconductor device having an improved negative bias temperature instability lifetime characteristic is manufactured by forming a first insulating layer on a substrate, performing a first nitridation on the first insulating layer to form a second insulating layer, and sequentially performing a first and second anneal on the second insulating layer to form a third insulating layer, wherein the second anneal is performed at a higher temperature and with a different gas than the first anneal. A second nitridation is performed on the third insulating layer to form a fourth insulating layer, and a sequential third and fourth anneal on the fourth insulating layer forms a fifth insulating layer. The third anneal is performed at a higher temperature than the first anneal, and the fourth anneal is performed at a higher temperature than the second anneal and with a different gas than the third anneal.
Abstract:
A nonvolatile memory device, a method of fabricating the nonvolatile memory device and a processing system including the nonvolatile memory device. The nonvolatile memory device may include a plurality of internal electrodes that extend in a direction substantially perpendicular to a face of a substrate, a plurality of first external electrodes that extend substantially in parallel with the face of the substrate, and a plurality of second external electrodes that also extend substantially in parallel with the face of the substrate. Each first external electrode is on a first side of a respective one of the internal electrodes, and each second external electrode is on a second side of a respective one of the internal electrodes. These devices also include a plurality of variable resistors that contact the internal electrodes, the first external electrodes and the second external electrodes.
Abstract:
In a method of forming a contact structure, a first insulation layer including a first contact hole is formed on a substrate. A metal layer including tungsten is formed to fill the first contact hole. A planarization process is performed on the metal layer until the first insulation layer is exposed to form a first contact. A second contact is grown from the first contact. The second contact is formed without performing a photolithography process and an etching process to prevent misalignments.
Abstract:
A nonvolatile memory device, a method of fabricating the nonvolatile memory device and a processing system including the nonvolatile memory device. The nonvolatile memory device may include a plurality of internal electrodes that extend in a direction substantially perpendicular to a face of a substrate, a plurality of first external electrodes that extend substantially in parallel with the face of the substrate, and a plurality of second external electrodes that also extend substantially in parallel with the face of the substrate. Each first external electrode is on a first side of a respective one of the internal electrodes, and each second external electrode is on a second side of a respective one of the internal electrodes. These devices also include a plurality of variable resistors that contact the internal electrodes, the first external electrodes and the second external electrodes.
Abstract:
A semiconductor device having an improved negative bias temperature instability lifetime characteristic is manufactured by forming a first insulating layer on a substrate, performing a first nitridation on the first insulating layer to form a second insulating layer, and sequentially performing a first and second anneal on the second insulating layer to form a third insulating layer, wherein the second anneal is performed at a higher temperature and with a different gas than the first anneal. A second nitridation is performed on the third insulating layer to form a fourth insulating layer, and a sequential third and fourth anneal on the fourth insulating layer forms a fifth insulating layer. The third anneal is performed at a higher temperature than the first anneal, and the fourth anneal is performed at a higher temperature than the second anneal and with a different gas than the third anneal.
Abstract:
A nonvolatile memory device, a method of fabricating the nonvolatile memory device and a processing system including the nonvolatile memory device. The nonvolatile memory device may include a plurality of internal electrodes that extend in a direction substantially perpendicular to a face of a substrate, a plurality of first external electrodes that extend substantially in parallel with the face of the substrate, and a plurality of second external electrodes that also extend substantially in parallel with the face of the substrate. Each first external electrode is on a first side of a respective one of the internal electrodes, and each second external electrode is on a second side of a respective one of the internal electrodes. These devices also include a plurality of variable resistors that contact the internal electrodes, the first external electrodes and the second external electrodes.