摘要:
Methods of forming a semiconductor device are provided. The methods may include forming first and second layers that are alternately and repeatedly stacked on a substrate, and forming an opening penetrating the first and second layers. The methods may also include forming a first semiconductor pattern in the opening. The methods may additionally include forming an insulation pattern on the first semiconductor pattern. The methods may further include forming a second semiconductor pattern on the insulation pattern. The methods may also include providing dopants in the first semiconductor pattern. Moreover, the methods may include thermally treating a portion of the first semiconductor pattern to form a third semiconductor pattern.
摘要:
Methods of fabricating metal-oxide-semiconductor (MOS) transistors having elevated source/drain regions are provided. The MOS transistors formed by these methods may include a gate pattern formed to cross over a predetermined region of a substrate. Recessed regions are provided in the substrate adjacent to the gate pattern. Epitaxial layers are provided on bottom surfaces of the recessed regions. High concentration impurity regions are provided in the epitaxial layers. The recessed regions may be formed using a chemical dry etching techniques.
摘要:
Nonvolatile memory devices include a string of nonvolatile memory cells on a substrate. This string of nonvolatile memory cells includes a first vertical stack of nonvolatile memory cells on the substrate and a string selection transistor on the first vertical stack of nonvolatile memory cells. A second vertical stack of nonvolatile memory cells is also provided on the substrate and a ground selection transistor is provided on the second vertical stack of nonvolatile memory cells. This second vertical stack of nonvolatile memory cells is provided adjacent the first vertical stack of nonvolatile memory cells. A conjunction doped semiconductor region is provided in the substrate. This conjunction doped region electrically connects the first vertical stack of nonvolatile memory cells in series with the second vertical stack of nonvolatile memory cells so that these stacks can operate as a single NAND-type string of memory cells.
摘要:
In a vertical-type semiconductor device, a method of manufacturing the same and a method of operating the same, the vertical-type semiconductor device includes a single-crystalline semiconductor pattern having a pillar shape provided on a substrate, a gate surrounding sidewalls of the single-crystalline semiconductor pattern and having an upper surface lower than an upper surface of the single-crystalline semiconductor pattern, a mask pattern formed on the upper surface of the gate, the mask pattern having an upper surface coplanar with the upper surface of the single-crystalline semiconductor pattern, a first impurity region in the substrate under the single-crystalline semiconductor pattern, and a second impurity region under the upper surface of the single-crystalline semiconductor pattern. The vertical-type pillar transistor formed in the single-crystalline semiconductor pattern may provide excellent electrical properties. The mask pattern is not provided on the upper surface of the single-crystalline semiconductor pattern in the second impurity region, to thereby reduce failures of processes.
摘要:
Methods of forming nonvolatile memory devices include forming a vertical stack of nonvolatile memory cells on a substrate. This is done by forming a vertical stack of spaced-apart gate electrodes on a first sidewall of a vertical silicon active layer and treating a second sidewall of the vertical silicon active layer in order to reduce crystalline defects within the active layer and/or reduce interface trap densities therein. This treating can include exposing the second sidewall with an oxidizing species that converts a surface of the second sidewall into a silicon dioxide passivation layer. A buried insulating pattern may also be formed directly on the silicon dioxide passivation layer.
摘要:
A semiconductor device includes a trench isolation region provided on a substrate and defining first and second active regions separated from each other. A first semiconductor pillar protruding upward from the first active region is provided. A second semiconductor pillar protruding upward from the second active region is provided. A first gate mask extending to cross over the first and second active regions is provided. The first gate mask surrounds upper sidewalls of the first and second semiconductor pillars. A first gate line formed below the first gate mask, separated from the first and second active regions, and surrounding parts of sidewalls of the first and second semiconductor pillars is provided.
摘要:
Provided are a semiconductor memory device and a method of manufacturing the same. The semiconductor memory device may include a plurality of active pillars projecting from a semiconductor substrate, a gate pattern disposed on at least a portion of each of the active pillars with a gate insulator interposed therebetween, and a conductive line disposed on each of the active pillars and below the corresponding gate pattern, the conductive line may be insulated from the semiconductor substrate and the gate pattern, wherein each of the active pillars may include a drain region above the corresponding gate pattern, a body region adjacent to the corresponding gate pattern, and a source region that is in contact with the conductive line below the gate pattern.
摘要:
Nonvolatile memory devices and methods of manufacturing nonvolatile memory devices are provided. The method includes patterning a bulk substrate to form an active pillar; forming a charge storage layer on a side surface of active pillar; and forming a plurality of gates connected to the active pillar, the charge storage layer being disposed between the active pillar and the gates. Before depositing a gate, a bulk substrate is etched using a dry etching to form a vertical active pillar which is in a single body with a semiconductor substrate.
摘要:
In a vertical-type non-volatile memory device, first and second single-crystalline semiconductor pillars are arranged to face each other on a substrate. Each of the first and second single-crystalline semiconductor pillars has a rectangular parallelepiped shape with first, second, third and fourth sidewalls. A first tunnel oxide layer, a first charge storage layer and a first blocking dielectric layer are sequentially stacked on the entire surface of the first sidewall of the first single-crystalline semiconductor pillar. A second tunnel oxide layer, a second charge storage layer and a second blocking dielectric layer are sequentially stacked on the entire surface of the first sidewall of the second single-crystalline semiconductor pillar. A word line makes contact with surfaces of both the first and second blocking dielectric layers. The word line is used in common for the first and second single-crystalline semiconductor pillars.
摘要:
A method of fabricating a semiconductor device includes forming an insulation layer structure on a single-crystalline silicon substrate, forming a first insulation layer structure pattern comprising a first opening by etching a portion of the insulation layer structure, filling the first opening with a non-single-crystalline silicon layer, and forming a single-crystalline silicon pattern by irradiating a first laser beam onto the non-single-crystalline silicon layer. The method also includes forming a second insulation layer structure pattern comprising a second opening by etching a portion of the first insulation layer structure, filling the second opening with a non-single-crystalline silicon-germanium layer, and forming a single-crystalline silicon-germanium pattern by irradiating a second laser beam onto the non-single-crystalline silicon-germanium layer.