摘要:
To provide a semiconductor device able to be made uniform in diffusion depth of the impurity in a diffusion layer by a single diffusion and to give the desired threshold voltage and improved in yield and a method of producing the same. The device has a channel layer 16 formed on a substrate 12, a diffusion stop layer 17 formed on the top surface of the channel layer 16, a diffusion layer 18 formed on the top surface of the diffusion stop layer, and a doping region 25 formed adjoining the diffusion stop layer 17 at least at part of the diffusion layer 18 and having an impurity diffused in it, the diffusion stop layer 17 having a slower diffusion rate of the impurity than the diffusion rate of the diffusion layer 18 and stopping diffusion of the impurity from the diffusion layer 18.
摘要:
The invention provides a method of manufacturing a fin-type field effect transistor (FinFET) that forms a unique FinFET that has a first fin with a central channel region and source and drain regions adjacent the channel region, a gate intersecting the first fin and covering the channel region, and a second fin having only a channel region.
摘要:
A method for fabricating a semiconductor gate structure including depositing at least one sacrificial layer on a semiconductor substrate; patterning the at least one sacrificial layer to form at least one cutout in the at least one sacrificial layer for uncovering the semiconductor substrate; forming a sidewall spacer over the sidewalls of the at least one sacrificial layer in the at least one cutout; forming a gate dielectric on the semiconductor substrate in the cutout; providing a gate electrode in the at least one cutout in the at lest one sacrificial layer; and removing the at least one sacrificial layer for the uncovering the gate electrode surrounded by the sidewall spacer. A semiconductor device is also provided.
摘要:
Optimal strain in the channel region of a PMOS transistor is provided by silicon alloy material in the junction regions of the device in a non-planar relationship with the surface of the substrate. The silicon alloy material, the dimensions of the silicon alloy material, as well as the non-planar relationship of the silicon alloy material with the surface of the substrate are selected so that the difference between the lattice spacing of the silicon alloy material and of the substrate causes strains in the silicon alloy material below the substrate surface, as well as above the substrate surface, to affect an optimal silicon alloy induced strain in the substrate channel. In addition, the non-planar relationship may be selected so that any strains caused by different lattice spaced layers formed over the silicon alloy material have a reduced effect on the strain in the channel region.
摘要:
Methods for fabricating Fin-Field Effect Transistors (Fin-FETs) are provided. A fin is formed on an integrated circuit substrate. The fin defines a trench on the integrated circuit substrate. A first insulation layer is formed in the trench such that a surface of the first insulation layer is recessed beneath a surface of the fin exposing sidewalls of the fin. A protection layer is formed on the first insulation layer and a second insulation layer is formed on the protection layer in the trench such that protection layer is between the second insulation layer and the sidewalls of the fin. Related Fin-FETs are also provided.
摘要:
Floating-gate memory cells having a trench source-line contact are suited for increased packing densities without a need for low-resistance ground straps placed at regular intervals across a memory array. Such floating-gate memory cells have their drain regions and source regions formed in a first semiconductor region having a first conductivity type. This first semiconductor region is separated from the underlying substrate by an interposing second semiconductor region having a second conductivity type different from the first conductivity type. The source regions of the memory cells are coupled to the second semiconductor region as a common source line. Such memory cells can be programmed, read and erased by applying various potential levels to their control gates, their drain regions, the first semiconductor region, and the second semiconductor region.
摘要:
A reverse blocking semiconductor device that shows no adverse effect of an isolation region on reverse recovery peak current, that has a breakdown withstanding structure exhibiting satisfactory soft recovery, that suppresses aggravation of reverse leakage current, which essentially accompanies a conventional reverse blocking IGBT, and that retains satisfactorily low on-state voltage is disclosed. The device includes a MOS gate structure formed on a nnull drift layer, the MOS gate structure including a pnull base layer formed in a front surface region of the drift layer, an nnull emitter region formed in a surface region of the base layer, a gate insulation film covering a surface area of the base layer between the emitter region and the drift layer, and a gate electrode formed on the gate insulation film. An emitter electrode is in contact with both the emitter region and the base layer of the MOS gate structure. A pnull isolation region surrounds the MOS gate structure through the drift layer and extends across whole thickness of the drift layer. A pnull collector layer is formed on a rear surface of the drift layer and connects to a rear side of the isolation region. A distance W is greater than a thickness d, in which the distance W is a distance from an outermost position of a portion of the emitter electrode, the portion being in contact with the base layer, to an innermost position of the isolation region, and the thickness d is a dimension in a depth direction of the drift layer.
摘要翻译:没有显示隔离区域对反向恢复峰值电流的不利影响的反向阻挡半导体器件,其具有显示令人满意的软恢复的击穿耐受结构,其抑制基本上伴随常规反向阻断IGBT的反向漏电流的恶化,并且 公开了令人满意的低导通电压。 该器件包括形成在n漂移层上的MOS栅极结构,该MOS栅极结构包括形成在该漂移层的前表面区域中的p +基极层,形成在该基极层的表面区域中的n +发射极区域, 覆盖发射极区域和漂移层之间的基底层的表面区域的栅极绝缘膜,以及形成在栅极绝缘膜上的栅电极。 发射极电极与MOS栅极结构的发射极区域和基极层接触。 p +隔离区域通过漂移层包围MOS栅极结构,并延伸穿过漂移层的整个厚度。 p +集电极层形成在漂移层的后表面上并连接到隔离区的后侧。 距离W大于厚度d,其中距离W是距离发射电极的一部分的最外侧位置(与基层接触的部分)到隔离区域的最内位置的距离,以及 厚度d是漂移层的深度方向的尺寸。
摘要:
Segmented power transistors and fabrication methods are disclosed in which transistor segments are spaced from one another to facilitate thermal diffusion, and in which other electrical devices can be formed in the spaces between transistor segments.
摘要:
A Top Oxide Method is used to form an oxide layer over an array of vertical transistors as in a trench dynamic random access memory (DRAM) array with vertically stacked access metal oxide semiconductor field effect transistors (MOSFETs). The Top Oxide is formed by first forming the vertical devices with the pad nitride remaining in place. Once the devices have been formed and the gate polysilicon has been planarized down to the surface of the pad nitride, the pad nitride is stripped away leaving the tops of the gate polysilicon plugs extending above the active silicon surface. This pattern of polysilicon plugs defines the pattern over which the Top Oxide is deposited. The deposited Top Oxide fills the regions between and on top of the polysilicon plugs. The Top Oxide is then planarized back to the tops of the polysilicon plugs so contacts can be made between the passing interconnects and the gates of the vertical devices. The Top Oxide layer serves to separate the passing interconnects from the active silicon thereby reducing capacitive coupling between the two levels and providing a robust etch-stop layer for the reactive ion etch (RIE) patterning of the subsequent interconnect level.
摘要:
An electrochemical device is provided, comprising a source contact connected to a first antenna pad, a drain contact connected to a second antenna pad, at least one gate electrode, an electrochemically active element arranged between, and in direct electrical contact with, the source and drain contacts, which electrochemically active element comprises a transistor channel and is of a material comprising an organic material having the ability of electrochemically altering its conductivity through change of redox state thereof, and a solidified electrolyte in direct electrical contact with the electrochemically active element and the at least one gate electrode and interposed between them in such a way that electron flow between the electrochemically active element and the gate electrode(s) is prevented. In the device, flow of electrons between source contact and drain contact is controllable by means of a voltage applied to the gate electrode(s).