Abstract:
Methods of fabricating a memory unit are provided including forming a plurality of first nanowire structures, each of which includes a first nanowire extending in a first direction parallel to the first substrate and a first electrode layer enclosing the first nanowire, on a first substrate. The first electrode layers are partially removed to form first electrodes beneath the first nanowires. A first insulation layer filling up spaces between structures, each of which includes the first nanowire and the first electrode, is formed on the first substrate. A second electrode layer is formed on the first nanowires and the first insulation layer. A plurality of second nanowires is formed on the second electrode layer, each of which extends in a second direction perpendicular to the first direction. The second electrode layer is partially etched using the second nanowires as an etching mask to form a plurality of second electrodes. Related memory units, methods of fabricating semiconductor devices and semiconductor devices are also provided.
Abstract:
An organic memory device may include a stack of an organic material layer and a fullerene layer to provide a data storage element between first and second electrodes. The data storage element may include an organic material layer formed on the first electrode, and a fullerene layer between the organic material layer and the second electrode. Methods of fabricating organic memory devices are also discussed.
Abstract:
First nanowires and second nanowires are alternately disposed and spaced apart on a first substrate in a second direction that is parallel to an adjacent major surface of the first substrate. Each of the first and second nanowires extends in a first direction that is perpendicular to the second direction, and the first and second nanowires are doped with first and second conductive types, respectively. A plurality of gate lines are formed that are at least partially disposed within the first substrate, that are spaced apart in a third direction, that extend in a fourth direction that is perpendicular to the third direction, and that partially enclose the first and second nanowires
Abstract:
Methods of fabricating a memory unit are provided including forming a plurality of first nanowire structures, each of which includes a first nanowire extending in a first direction parallel to the first substrate and a first electrode layer enclosing the first nanowire, on a first substrate. The first electrode layers are partially removed to form first electrodes beneath the first nanowires. A first insulation layer filling up spaces between structures, each of which includes the first nanowire and the first electrode, is formed on the first substrate. A second electrode layer is formed on the first nanowires and the first insulation layer. A plurality of second nanowires is formed on the second electrode layer, each of which extends in a second direction perpendicular to the first direction. The second electrode layer is partially etched using the second nanowires as an etching mask to form a plurality of second electrodes. Related memory units, methods of fabricating semiconductor devices and semiconductor devices are also provided.
Abstract:
A cross-point nonvolatile memory device using a binary metal oxide layer as a data storage material layer includes spaced apart doped lines disposed in a substrate. Spaced apart upper electrodes cross over the doped lines such that cross points are formed where the upper electrodes overlap the doped lines. Lower electrodes are disposed at the cross points between the doped lines and the upper electrodes. A binary metal oxide layer is provided between the upper electrodes and the lower electrodes and provided as a data storage material layer. Doped regions are provided between the lower electrodes and the doped lines and form diodes together with the doped lines. The doped regions have an opposite polarity to the doped lines.
Abstract:
Nonvolatile memory devices and methods of manufacturing the same are provided. The nonvolatile memory devices may include an oxide layer formed of a resistance conversion material, a lower electrode, a nano-wire layer formed of a transition metal on the lower electrode, and an upper electrode formed on the oxide layer. According to example embodiments, a reset current may be stabilized by unifying a current path on the oxide layer.
Abstract:
A resistive memory cell employs a photoimageable switchable material, which is patternable by actinic irradiation and is reversibly switchable between distinguishable resistance states, as a memory element. Thus, the photoimageable switchable material is directly patterned by the actinic irradiation so that it is possible to fabricate the resistive memory cell through simple processes, and avoiding ashing and stripping steps.
Abstract:
An organic memory device may include a stack of an organic material layer and a fullerene layer to provide a data storage element between first and second electrodes. The data storage element may include an organic material layer formed on the first electrode, and a fullerene layer between the organic material layer and the second electrode. Methods of fabricating organic memory devices are also discussed.
Abstract:
Methods and apparatus for depositing a layer including providing at least one precursor vapor to a process chamber, providing a gas to the process chamber, separate from the at least one precursor vapor, and forming a compound layer from the at least one precursor vapor and the gas on a wafer in the process chamber. The deposition may be a chemical vapor deposition (CVD) deposition method, a metal organic chemical vapor deposition (MOCVD) deposition method, an atomic layer deposition (ALD) deposition method, or other similar deposition method. The compound layer may be at least one of an oxide, nitride, carbide, or other similar layer.
Abstract:
A thin film transistor includes a layer structure having a gate electrode, a gate insulation layer and a channel layer. A source line may contact the channel layer, and may extend along a direction crossing over the gate electrode. The source line may partially overlap the gate electrode so that both sides of the source line overlapping the gate electrode may be entirely positioned between both sides of the gate electrode. A drain line may make contact with the channel layer and may be spaced apart from the source line by a channel length. The drain line may have a structure symmetrical to that of the source line. Overlap areas among the gate electrode, the source line and the drain line may be reduced, so that the thin film transistor may ensure a high cut-off frequency.