摘要:
A nitrogen implantation to a substrate on the edges of an active area is added before filling an insulating layer in a trench during a shallow trench isolation process to reduce the thickness of a gate oxide formed later on the edges of the active area.
摘要:
A phase change memory writing circuit is provided. The circuit comprises a writing path and a fast write control unit. The writing path further comprises a current driving unit, a first switch device and a phase change memory cell. The current driving unit is coupled to a high voltage source and outputs a driving current. The first switch device is controlled by a first control signal. The fast write control unit is coupled to the writing path to provide a writing voltage to the writing path. When the first switch device is turned off, the fast write control unit outputs the writing voltage to the writing path. When the first switch device is turned on, the fast write control unit stops outputting the writing voltage to the writing path.
摘要:
Capacitors and methods for fabricating the same are provided. An exemplary embodiment of a capacitor comprises a dielectric layer and a first conductive layer thereover. A supporting rib is embedded in the first conductive layer and extends along a first direction. A second conductive layer is embedded in the first conductive layer and extends along a second direction perpendicular with the first direction, wherein a portion of the second conductive layer forms across the supporting rib and is structurally supported by the supporting rib. A capacitor layer is formed between the first and second conductive layers to electrically insulate the first and second conductive layers.
摘要:
A method for forming a semiconductor device is disclosed. A substrate comprising trenches are provided. Dopants are doped into a region of the substrate neighboring a sidewall of the trenches by using an isotropic doping method. A gate dielectric layer is formed on the sidewall of the substrate. A gate electrode is formed in the trenches, wherein the gate electrode protrudes a surface of the substrate.
摘要:
A method for fabricating a non-volatile memory is provided. Parallel-arranged isolation structures are disposed in a substrate and protrude from the surface of the substrate to define active regions. Mask layers intersecting the isolation structures are deposited on the substrate. The surface of the mask layers is higher than that of the isolation structures. Doped regions are formed in the substrate. Insulating layers are deposited on the substrate between the mask layers. The insulating layers and the mask layers have different etch selectivities. The mask layers are removed to expose the substrate. A tunneling dielectric layer is formed on the substrate. A floating gate is deposited on the substrate surrounded by the isolation structures and the insulating layers. The surface of the floating gate is lower than that of the isolation structures. An inter-gate dielectric layer is deposited on the substrate. A control gate is disposed between the insulating layers.
摘要:
A semiconductor device is provided. The semiconductor device has a gate structure, a source region, a drain region, and a pair of dielectric barrier layers. The gate structure is formed on a substrate. The source region and the drain region are formed in the substrate next to the gate structure, and a channel region is formed between the source region and the drain region underneath the gate structure. The pair of dielectric barrier layers is respectively formed in the substrate underneath the gate structure between the source region and the drain region. The dielectric barrier layers are used for reducing the drain induced barrier lowering effect in a nanometer scale device.
摘要:
Phase change memory cell structures and methods for fabricating the same are provided. An exemplary embodiment of a phase change memory cell structure includes a first electrode formed over a first dielectric layer. A second dielectric layer is formed over the first electrode. A conductive member is formed through the second dielectric layer and electrically contacting the first electrode, wherein the conductive member comprises a lower element and an upper element sequentially stacking over the first electrode, and the lower and upper elements comprises different materials. A phase change material layer is formed over the second dielectric layer, electrically contacting the conductive member. A second electrode is formed over the phase change material layer.
摘要:
A method for preparing a shallow trench isolation comprising the steps of forming at least one trench in a semiconductor substrate, performing an implanting process to implant nitrogen-containing dopants into an upper sidewall of the trench such that the concentration of the nitrogen-containing dopants in the upper sidewall is higher than that in the bottom sidewall of the trench, forming a spin-on dielectric layer filling the trench and covering the surface of the semiconductor substrate, performing a thermal oxidation process to form a silicon oxide layer covering the inner sidewall. Since the nitrogen-containing dopants can inhibit the oxidation rate and the concentration of the nitrogen-containing dopants in the upper inner sidewall is higher than that in the bottom inner sidewall of the trench, the thickness of the silicon oxide layer formed by the thermal oxidation process is larger at the bottom portion than at the upper portion of the trench.
摘要:
A novel NAND flash memory cell array and the method of fabricating the same are disclosed in this invention. The NAND flash memory cell array comprises a substrate with an active area; a plurality of cells arranged in a row on the active area; a first barrier layer covering the cells and the active area around each end of the row; a first oxide deposited to fill a gap between the cells; an oxide spacer formed along the sidewall of a cell located at each end of the row; and a poly spacer formed on the oxide spacer acting as a selection gate for driving the row of cells. The aspect ratio of the gap between the cells is about 1.8 to 3.2. Many advantages are provided with such NAND flash memory fabricating by the self-aligned process of the present invention.
摘要:
A method for forming a gate structure with a pulled-back conductive layer and the use of the method are provided. The method conducts a local, not global, pull-back process on the conductive layer of the gate structure at the position intended for contact window formation, wherein the pull-back process is conducted after rapid thermal oxidation to prevent CBCB short, CB open and/or CBGC short.