Abstract:
A method of forming a conductive contact includes forming a structure comprising an upper surface joining with a sidewall surface. The sidewall surface contains elemental-form silicon. Silicon is epitaxially grown from the sidewall surface. Dielectric material is formed over the upper surface and the epitaxially-grown silicon. A conductive contact is formed through the dielectric material to conductively connect with the upper surface.
Abstract:
A memory device includes a plurality of isolations and trench fillers arranged in an alternating manner in a direction, a plurality of mesa structures between the isolations and trench fillers, and a plurality of word lines each overlying a side surface of the respective mesa. In one embodiment of the present invention, the width measured in the direction of the trench filler is smaller than that of the isolation, each mesa structure includes at least one paired source/drain regions and at least one channel base region corresponding to the paired source/drain regions, and each of the word lines is on a side surface of the mesa structure, adjacent the respective isolation, and is arranged adjacent the channel base region.
Abstract:
A memory structure including a substrate, a first dielectric layer, a first conducting layer, a second conducting layer, a second dielectric layer, a spacer and a doped region is provided. The substrate has a trench wherein. The first dielectric layer is disposed on the interior surface of the trench. The first conducting layer is disposed on the first dielectric layer of the lower portion of the trench. The second conducting layer is disposed above the first conducting layer and filling the trench. The second dielectric layer is disposed between the first conducting layer and the second conducting layer. The spacer is disposed between the first dielectric layer and the second conducting layer. The doped region is disposed in the substrate of a side of the trench.
Abstract:
A method for fabricating the memory structure includes: providing a substrate having a pad, forming an opening in the pad, forming a first spacer on a sidewall of the opening, filling the opening with a sacrificial layer, removing the first spacer and exposing a portion of the substrate, removing the exposed substrate to define a first trench and a second trench, removing the sacrificial layer to expose a surface of the substrate to function as a channel region, forming a first dielectric layer on a surface of the first trench, a surface of the second trench and a surface of the channel region, filling the first trench and the second trench with a first conductive layer, forming a second dielectric layer on a surface of the first conductive layer and the surface of the channel region, filling the opening with a second conductive layer, and removing the pad.
Abstract:
A memory structure including a substrate, a first dielectric layer, a first conducting layer, a second conducting layer, a second dielectric layer, a spacer and a doped region is provided. The substrate has a trench wherein. The first dielectric layer is disposed on the interior surface of the trench. The first conducting layer is disposed on the first dielectric layer of the lower portion of the trench. The second conducting layer is disposed above the first conducting layer and filling the trench. The second dielectric layer is disposed between the first conducting layer and the second conducting layer. The spacer is disposed between the first dielectric layer and the second conducting layer. The doped region is disposed in the substrate of a side of the trench.
Abstract:
A floating gate and fabrication method thereof. A semiconductor substrate is provided, on which an oxide layer, a first conducting layer, and a patterned hard mask layer having an opening are sequentially formed. A spacer is formed on the sidewall of the opening. A second conducting layer is formed on the hard mask layer. The second conducting layer is planarized to expose the surface of the patterned hard mask layer. The surface of the second conducting layer is oxidized to form an oxide layer. The patterned hard mask layer and the oxide layer and the first conducting layer underlying the patterned hard mask layer are removed.
Abstract:
A vertical DRAM and fabrication method thereof. The vertical DRAM has a plurality of memory cells on a substrate, and each of the memory cells has a trench capacitor, a vertical transistor, and a source-isolation oxide layer in a deep trench. The main advantage of the present invention is to form an annular source diffusion and an annular drain diffusion of the vertical transistor around the sidewall of the deep trench. As a result, when a gate of the transistor is turned on, an annular gate channel is provided. The width of the gate channel of the present invention is therefore increased.
Abstract:
A gate with dual gate dielectric layer and fabrication method thereof. A semiconductor substrate is provided, on which a dielectric layer and a patterned hard mask layer with an opening are sequentially formed. A spacer is formed on a sidewall of the opening. The semiconductor substrate is ion implanted, the spacer and the exposed dielectric layer are removed, and a gate oxide layer is formed on the bottom of the opening.
Abstract:
The present invention provides a method of manufacturing a FinFET transistor, comprising the steps of: forming a plurality of trenches in a semiconductor substrate, forming a dielectric layer on the semiconductor substrate and filling the trenches, and etching back the dielectric layer to a level below the surface of the substrate to form one or more semiconductor fins standing between the trenches as an active region, such as a source, drain, and channel for the FinFET transistor.
Abstract:
A method for fabricating a vertical nitride read-only memory (NROM) cell. A substrate having at least one trench is provided. A spacer is formed over the sidewall of the trench. Subsequently, ion implantation is performed on the substrate using the spacer as a mask to form doping areas as bit lines in the substrate near its surface and the bottom of the trench. Bit line oxides are formed over each of the doping areas. After the spacer is removed, a conformable insulating layer as gate dielectric is deposited on the sidewall of the trench and the surface of the bit line oxide. Finally, a conductive layer as a word line is deposited over the insulating layer and fills in the trench.