Abstract:
A plurality of nanowires is grown on a first substrate in a first direction perpendicular to the first substrate. An insulation layer covering the nanowires is formed on the first substrate to define a nanowire block including the nanowires and the insulation layer. The nanowire block is moved so that each of the nanowires is arranged in a second direction parallel to the first substrate. The insulation layer is partially removed to partially expose the nanowires. A gate line covering the exposed nanowires is formed. Impurities are implanted into portions of the nanowires adjacent to the gate line.
Abstract:
In a complementary metal-oxide semiconductor (CMOS) transistor and a method of manufacturing the same, a semiconductor channel material having a first conductivity type is provided on a substrate. A first transistor having the first conductivity type and a second transistor having a second conductivity type are positioned on the substrate, respectively. The first transistor includes a first gate positioned on a first surface of the channel material through a medium of a gate insulation layer and a pair of ohmic contacts positioned on a second surface of the channel material and crossing over both side portions of the first gate electrode, respectively. The second transistor includes a second gate positioned on the first surface of the channel material through a medium of the gate insulation layer and a pair of Schottky contacts positioned on the second surface of the channel material and crossing over both side portions of the second gate electrode, respectively.
Abstract:
A field-effect transistor has at least one electrode disposed independently of source and drain electrodes and in direct contact with the surface of a semiconductor channel to form a schottky barrier, so that it is possible to easily control the schottky barrier.
Abstract:
A method of programming a non-volatile memory device including a transition metal oxide layer includes applying a first electric pulse to the transition metal oxide layer for a first period to establish a resistance of the transition metal oxide layer and applying a second electric pulse to the transition metal oxide layer for a second period, longer than the first period, to increase the resistance of the transition metal oxide layer. Related devices are also disclosed.
Abstract:
Non-volatile memory cells employing a transition metal oxide layer as a data storage material layer are provided. The non-volatile memory cells include a lower and upper electrodes overlapped with each other. A transition metal oxide layer pattern is provided between the lower and upper electrodes. The transition metal oxide layer pattern is represented by a chemical formula MxOy. In the chemical formula, the characters “M”, “O”, “x” and “y” indicate transition metal, oxygen, a transitional metal composition and an oxygen composition, respectively. The transition metal oxide layer pattern has excessive transition metal content in comparison to a stabilized transition metal oxide layer pattern. Methods of fabricating the non-volatile memory cells are also provided.
Abstract:
Non-volatile memory cells employing a transition metal oxide layer as a data storage material layer are provided. The non-volatile memory cells include a lower and upper electrodes overlapped with each other. A transition metal oxide layer pattern is provided between the lower and upper electrodes. The transition metal oxide layer pattern is represented by a chemical formula MxOy. In the chemical formula, the characters “M”, “O”, “x” and “y” indicate transition metal, oxygen, a transitional metal composition and an oxygen composition, respectively. The transition metal oxide layer pattern has excessive transition metal content in comparison to a stabilized transition metal oxide layer pattern. Methods of fabricating the non-volatile memory cells are also provided.
Abstract translation:提供了使用过渡金属氧化物层作为数据存储材料层的非易失性存储单元。 非易失性存储单元包括彼此重叠的下电极和上电极。 在下电极和上电极之间设置过渡金属氧化物层图案。 过渡金属氧化物层图案由化学式M X x O Y y表示。 在化学式中,字母“M”,“O”,“x”和“y”分别表示过渡金属,氧,过渡金属组成和氧组成。 与稳定的过渡金属氧化物层图案相比,过渡金属氧化物层图案具有过量的过渡金属含量。 还提供了制造非易失性存储单元的方法。
Abstract:
A ferroelectric random access memory (FRAM) includes a semiconductor substrate and an interlayer insulating layer on the substrate. A diffusion preventive layer is on the interlayer insulating layer. The diffusion preventive layer and the interlayer insulating layer have two node contact holes formed therein. Node conductive layer patterns are aligned with the node contact holes, respectively, and are disposed so as to protrude upward from the diffusion preventive layer. Lower electrodes are disposed on the diffusion preventive layer that cover the node conductive layer patterns, respectively. Thicknesses of the lower electrodes are gradually reduced from a line extending from upper surfaces of the node conductive layer patterns toward the diffusion preventive layer.
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:
Forming a ferroelectric memory device can include forming an insulating layer on a substrate, forming a sacrificial layer on the first insulating layer so that the insulating layer is between the sacrificial layer and the substrate, and forming a contact hole extending through the sacrificial layer and the insulating layer. A conductive contact plug can be formed in the contact hole. After forming the conductive contact plug in the contact hole, the sacrificial layer can be removed so that the conductive contact plug extends beyond the insulating layer, and so that sidewalls of the conductive contact plug extending beyond the insulating layer are exposed. A first electrode can be formed on exposed portions of the conductive contact plug, a ferroelectric layer can be formed on the first electrode, and a second electrode can be formed on the ferroelectric layer such that the ferroelectric layer is between the first and second electrodes. Related structures are also discussed.
Abstract:
A ferroelectric memory device and a method of fabricating the same are provided. The device includes a substrate where a conductive region is formed and an interlayer insulating layer. The interlayer insulating layer is stacked on the substrate and has a contact hole exposing the conductive region. The contact hole is filled with a contact plug having a projection over the interlayer insulating layer. The projection of the contact plug is covered with a capacitor including a lower electrode, a ferroelectric layer pattern, and an upper electrode. A width of the projection is preferably greater than that of the contact hole and smaller than that of the lower electrode. The method includes forming lower and upper interlayer insulating layers on a substrate where a conductive region is formed. The lower and upper interlayer insulating layers have a contact hole exposing the conductive region. After forming a conductive contact plug filling the contact hole, the upper interlayer insulating layer is removed to expose the lower interlayer insulating layer. Thus, an upper portion of the contact plug that is higher than the lower interlayer insulating layer is projected. Continuously, a lower electrode, a ferroelectric layer pattern, and an upper electrode sequentially cover the projected contact plug to form a capacitor. The upper interlayer insulating layer is preferably made of a material having an etch selectivity with respect to the lower interlayer insulating layer. The contact hole is preferably formed such that a width of the contact hole formed in the upper interlayer insulating layer is greater than that of the contact hole formed in the lower interlayer insulating layer.