Abstract:
Provided are three-dimensional semiconductor memory devices and methods of forming the same. The device includes a substrate, conductive patterns stacked on the substrate, and an active pattern penetrating the conductive patterns to be connected to the substrate. The active pattern may include a first doped region provided in an upper portion of the active pattern, and a diffusion-resistant doped region overlapped with at least a portion of the first doped region. The diffusion-resistant doped region may be a region doped with carbon.
Abstract:
Provided are three-dimensional semiconductor memory devices and methods of forming the same. The device includes a substrate, conductive patterns stacked on the substrate, and an active pattern penetrating the conductive patterns to be connected to the substrate. The active pattern may include a first doped region provided in an upper portion of the active pattern, and a diffusion-resistant doped region overlapped with at least a portion of the first doped region. The diffusion-resistant doped region may be a region doped with carbon.
Abstract:
A semiconductor device including a dielectric layer is provided. The semiconductor device includes a stack structure, and a vertical structure within the stack structure. The vertical structure includes a lower region having a first width and an upper region having a second width, greater than the first width. The vertical structure further includes two dielectric layers of which respective ratios of lower thicknesses in the lower region to upper thicknesses in the upper region are different from each other.
Abstract:
A semiconductor device includes: a substrate including a channel region; a gate dielectric a tunneling layer, a charge storage layer, and a blocking layer sequentially disposed on the channel region; and a gate electrode disposed on the gate dielectric, wherein the tunneling layer has variations in nitrogen concentrations in a direction perpendicular to the channel region, and has a maximum nitrogen concentration in a position shifted from a center of the tunneling layer toward the charge storage layer.
Abstract:
A semiconductor device including a dielectric layer is provided. The semiconductor device includes a stack structure, and a vertical structure within the stack structure. The vertical structure includes a lower region having a first width and an upper region having a second width, greater than the first width. The vertical structure further includes two dielectric layers of which respective ratios of lower thicknesses in the lower region to upper thicknesses in the upper region are different from each other.
Abstract:
The inventive concepts provide methods of manufacturing a semiconductor device. The method includes forming a thin layer structure including insulating layers and sacrificial layers alternately and repeatedly stacked on a substrate, forming a through-hole penetrating the thin layer structure and exposing the substrate, forming a semiconductor layer covering an inner sidewall of the through-hole and partially filling the through-hole, oxidizing a first portion of the semiconductor layer to form a first insulating layer, and injecting oxygen atoms into a second portion of the semiconductor layer. An oxygen atomic concentration of the second portion is lower than that of the first insulating layer. Oxidizing the first portion and injecting the oxygen atoms into the second portion are performed using an oxidation process at the same time.
Abstract:
Provided are a three dimensional semiconductor memory device and a method of fabricating the same. In the three dimensional semiconductor memory device, a stack of gate electrodes and insulating layers may be formed on a substrate, a channel structure may extend through the stack and connect to the substrate. A blocking insulating layer, a charge storing layer and a tunnel insulating layer may be formed between each gate electrode and the channel structure. The tunnel insulating layer may include a high-k dielectric layer with a low charge trap site density. The tunnel insulating layer may also include a first and a second tunnel insulating layers, and the high-k dielectric layer is provided between the first and second tunnel insulating layers.
Abstract:
Provided are a three dimensional semiconductor memory device and a method of fabricating the same. In the three dimensional semiconductor memory device, a stack of gate electrodes and insulating layers may be formed on a substrate, a channel structure may extend through the stack and connect to the substrate. A blocking insulating layer, a charge storing layer and a tunnel insulating layer may be formed between each gate electrode and the channel structure. The tunnel insulating layer may include a high-k dielectric layer with a low charge trap site density. The tunnel insulating layer may also include a first and a second tunnel insulating layers, and the high-k dielectric layer is provided between the first and second tunnel insulating layers.
Abstract:
A method of manufacturing a semiconductor device includes forming a mold structure including alternately stacked mold insulating and sacrificial layers on a substrate, forming a vertical structure through the mold structure, forming side openings by removing the sacrificial, forming a preliminary dielectric layer in the side openings, forming a dielectric layer by heat-treating the preliminary dielectric layer, removing a surface layer of the dielectric layer, forming a first conductive layer covering the dielectric layer in the side openings, and forming a second conductive layer covering the first conductive layer and filling the side openings.
Abstract:
The inventive concepts provide methods of manufacturing a semiconductor device. The method includes forming a thin layer structure including insulating layers and sacrificial layers alternately and repeatedly stacked on a substrate, forming a through-hole penetrating the thin layer structure and exposing the substrate, forming a semiconductor layer covering an inner sidewall of the through-hole and partially filling the through-hole, oxidizing a first portion of the semiconductor layer to form a first insulating layer, and injecting oxygen atoms into a second portion of the semiconductor layer. An oxygen atomic concentration of the second portion is lower than that of the first insulating layer. Oxidizing the first portion and injecting the oxygen atoms into the second portion are performed using an oxidation process at the same time.