摘要:
Integrated circuit memory devices having highly integrated SOI memory cells therein include an SOI substrate having a semiconductor active layer therein. A first trench isolation region is also provided. The first trench isolation region extends into and partitions the semiconductor active layer into first and second active regions. These first and second active regions are preferably electrically isolated from each other by the first trench isolation region. First and second access transistors are provided in the first and second active regions, respectively, and a first electrically insulating layer is provided on the SOI substrate. A first bit line is also provided at a first level. The first bit line is electrically connected to a first source/drain region of the first access transistor by a first bit line contact. This first bit line contact extends through the first electrically insulating layer and contacts the first source/drain region of the first access transistor. A second electrically insulating layer is also provided on the first bit line, opposite said first electrically insulating layer and a second bit line is provided on the second electrically insulating layer at a second level above the first level. The second bit line is electrically connected to a first source/drain region of the second access transistor by a second bit line contact which extends through the first and second electrically insulating layers and contacts the first source/drain region of the second access transistor. Higher integration densities can be achieved by dividing the active layer into electrically isolated active regions and then forming bit lines at different levels which are electrically connected to access transistors within these isolated active regions.
摘要:
In one embodiment, the semiconductor memory device includes a semiconductor substrate having projecting portions, a tunnel insulation layer formed over at least one of the projecting semiconductor substrate portions, and a floating gate structure disposed over the tunnel insulation layer. An upper portion of the floating gate structure is wider than a lower portion of the floating gate structure, and the lower portion of the floating gate structure has a width less than a width of the tunnel insulating layer. First insulation layer portions are formed in the semiconductor substrate and project from the semiconductor substrate such that the floating gate structure is disposed between the projecting first insulation layer portions. A dielectric layer is formed over the first insulation layer portions and the floating gate structure, and a control gate is formed over the dielectric layer.
摘要:
A non-volatile memory device includes a substrate having a first region and a second region. A first gate electrode is disposed on the first region. A multi-layered charge storage layer is interposed between the first gate electrode and the substrate, the multi-layered charge storage including a tunnel insulation, a trap insulation, and a blocking insulation layer which are sequentially stacked. A second gate electrode is placed on the substrate of the second region, the second gate electrode including a lower gate and an upper gate connected to a region of an upper surface of the lower gate. A gate insulation layer is interposed between the second gate electrode and the substrate. The first gate electrode and the upper gate of the second gate electrode comprise a same material.
摘要:
A semiconductor device includes a first substrate, a plurality of cell transistors and a second substrate. The first substrate has a first surface and a second surface opposite to the first surface. The plurality of cell transistors is formed extending on the first surface of the first substrate in a direction. The second substrate has an upper surface making contact with the second surface of the first substrate. Further, the upper surface of the second substrate has a bent structure to apply tensile stresses to the first substrate in the extending direction of the plurality of cell transistors. Thus, tensile stresses may be applied to the first substrate to improve the mobility of carriers in a channel region of the cell transistors.
摘要:
In a method of manufacturing a non-volatile memory device, a conductive structure is formed on a substrate. The conductive structure includes a tunnel oxide pattern, a first conductive pattern, a pad oxide pattern and a hard mask pattern. A trench is formed on the substrate using the conductive structure as an etching mask. An inner oxide layer is formed on an inner wall of the trench and sidewalls of the tunnel oxide pattern and the first conductive pattern. The inner oxide layer is cured, thereby forming a silicon nitride layer on the inner oxide layer. A device isolation pattern is formed in the trench, and the hard mask pattern and the pad oxide pattern are removed from the substrate. A dielectric layer and a second conductive pattern are formed on the substrate. Accordingly, the silicon nitride layer prevents hydrogen (H) atoms from leaking into the device isolation pattern.
摘要:
Integrated circuit nonvolatile memory devices are manufactured by forming a variable resistance layer on an integrated circuit substrate. The variable resistance layer includes grains that define grain boundaries between the grains. Conductive filaments are formed along at least some of the grain boundaries. Electrodes are formed on the variable resistance layer. The conductive filaments may be formed by implanting conductive ions into at least some of the grain boundaries. Moreover, the variable resistance layer may be a variable resistance oxide of a metal, and the conductive filaments may be the metal. Related devices are also disclosed.
摘要:
A semiconductor device includes a first substrate, a plurality of cell transistors and a second substrate. The first substrate has a first surface and a second surface opposite to the first surface. The plurality of cell transistors is formed extending on the first surface of the first substrate in a direction. The second substrate has an upper surface making contact with the second surface of the first substrate. Further, the upper surface of the second substrate has a bent structure to apply tensile stresses to the first substrate in the extending direction of the plurality of cell transistors. Thus, tensile stresses may be applied to the first substrate to improve the mobility of carriers in a channel region of the cell transistors.
摘要:
A non-volatile memory device includes a substrate having a first region and a second region. A first gate electrode is disposed on the first region. A multi-layered charge storage layer is interposed between the first gate electrode and the substrate, the multi-layered charge storage including a tunnel insulation, a trap insulation, and a blocking insulation layer which are sequentially stacked. A second gate electrode is placed on the substrate of the second region, the second gate electrode including a lower gate and an upper gate connected to a region of an upper surface of the lower gate. A gate insulation layer is interposed between the second gate electrode and the substrate. The first gate electrode and the upper gate of the second gate electrode comprise a same material.
摘要:
Methods of fabricating a semiconductor device having multi-gate insulation layers and semiconductor devices fabricated thereby are provided. The method includes forming a pad insulation layer and an initial high voltage gate insulation layer on a first region and a second region of a semiconductor substrate respectively. The initial high voltage gate insulation layer is formed to be thicker than the pad insulation layer. A first isolation layer that penetrates the pad insulation layer and is buried in the semiconductor substrate is formed to define a first active region in the first region, and a second isolation layer that penetrates the initial high voltage gate insulation layer and is buried in the semiconductor substrate is formed to define a second active region in the second region. The pad insulation layer is then removed to expose the first active region. A low voltage gate insulation layer is formed on the exposed first active region. Accordingly, it can minimize a depth of recessed regions (dent regions) to be formed at edge regions of the first isolation layer during removal of the pad insulation layer, and it can prevent dent regions from being formed at edge regions of the second isolation layer.
摘要:
A non-volatile memory device includes a substrate having a recess thereon, a resistant material layer pattern in the recess, a lower electrode on the resistant material layer pattern in the recess, a dielectric layer, and an upper electrode formed on the dielectric layer. The resistant material layer pattern includes a material whose resistance varies according to an applied voltage. The dielectric layer is formed on the substrate, the resistant material layer pattern and the lower electrode. An upper electrode overlaps the resistant material layer pattern and the lower electrode. The applied voltage is applied to access the upper and lower electrodes to vary the resistance of the resistant material layer pattern.