摘要:
Narrow-body FETs, such as, FinFETs and trigates, exhibit superior short-channel characteristics compared to thick-body devices, such as planar bulk Si FETs and planar partially-depleted SOI (PDSOI) FETs. A common problem, however, with narrow-body devices is high series resistance that often negates the short-channel benefits. The high series resistance is due to either dopant pile-up at the SOI/BOX interface or dopant diffusion into the BOX. This disclosure describes a novel narrow-body device geometry that is expected to overcome the high series resistance problem.
摘要:
A method is provided to fabricate a semiconductor device, where the method includes providing a substrate comprised of crystalline silicon; implanting a ground plane in the crystalline silicon so as to be adjacent to a surface of the substrate, the ground plane being implanted to exhibit a desired super-steep retrograde well (SSRW) implant doping profile; annealing implant damage using a substantially diffusionless thermal annealing to maintain the desired super-steep retrograde well implant doping profile in the crystalline silicon and, prior to performing a shallow trench isolation process, depositing a silicon cap layer over the surface of the substrate. The substrate may be a bulk Si substrate or a Si-on-insulator substrate. The method accommodates the use of an oxynitride gate stack structure or a high dielectric constant oxide/metal (high-K/metal) gate stack structure. The various thermal processes used during fabrication are selected/controlled so as to maintain the desired super-steep retrograde well implant doping profile in the crystalline silicon.
摘要:
An inverter device includes a first nanowire connected to a voltage source node and a ground node, a first p-type field effect transistor (pFET) device having a gate disposed on the first nanowire, and a first n-type field effect transistor (nFET) device having a gate disposed on the first nanowire.
摘要:
A semiconductor fabrication method includes depositing a dummy gate layer onto a substrate, patterning the dummy gate layer, depositing a hardmask layer over the dummy gate layer, patterning the hardmask layer, etching a recess into the substrate, adjacent the dummy gate layer, depositing a semiconductor material into the recess, removing the hardmask layer, depositing replacement spacers onto the dummy gate layer, performing an oxide deposition over the dummy gate layer and replacement spacers, removing the dummy gate and replacement spacers, thereby forming a gate recess in the oxide and depositing a gate stack into the recess.
摘要:
A semiconductor substrate structure for manufacturing integrated circuit devices includes a bulk substrate; a lower insulating layer formed on the bulk substrate, the lower insulating layer formed from a pair of separate insulation layers having a bonding interface therebetween; an electrically conductive layer formed on the lower insulating layer; an insulator with etch stop characteristics formed on the electrically conductive layer; an upper insulating layer formed on the etch stop layer; and a semiconductor layer formed on the upper insulating layer. A scheme of subsequently building a dual-depth shallow trench isolation with the deeper STI in the back gate layer self-aligned to the shallower STI in the active region in such a semiconductor substrate is also disclosed.
摘要:
A method of forming a transistor device includes forming a dummy gate stack structure over an SOI starting substrate, comprising a bulk layer, a global BOX layer over the bulk layer, and an SOI layer over the global BOX layer. Self-aligned trenches are formed completely through portions of the SOI layer and the global BOX layer at source and drain regions. Silicon is epitaxially regrown in the source and drain regions, with a local BOX layer re-established in the epitaxially regrown silicon, adjacent to the global BOX layer. A top surface of the local BOX layer is below a top surface of the global BOX layer. Embedded source and drain stressors are formed in the source and drain regions, adjacent a channel region. Silicide contacts are formed on the source and drain regions. The dummy gate stack structure is removed, and a final gate stack structure is formed.
摘要:
Exemplary embodiments include a method for fabricating a heterojunction tunnel field-effect-transistor (FET), the method including forming a gate region on a silicon layer of a silicon-on-insulator (SOI) substrate, forming a drain region on the silicon layer adjacent the gate region and forming a vertical heterojunction source region adjacent the gate region, wherein the vertical heterojunction source region generates a tunnel path inline with a gate field associated with the gate region.
摘要:
A method of modifying a wafer having semiconductor disposed on an insulator is provided and includes establishing first and second regions of the wafer with different initial semiconductor thicknesses, forming pairs of semiconductor pads connected via respective nanowire channels at each of the first and second regions and reshaping the nanowire channels into nanowires each having a respective differing thickness reflective of the different initial semiconductor thicknesses at each of the first and second regions.
摘要:
Metal-oxide semiconductor field effect transistor (MOSFET) devices having metal gate stacks and techniques for improving performance thereof are provided. In one aspect, a metal-oxide semiconductor device is provided comprising a substrate having a buried oxide layer at least a portion of which is configured to serve as a primary background oxygen getterer of the device; and a gate stack separated from the substrate by an interfacial oxide layer. The gate stack comprises a high-K layer over the interfacial oxide layer; and a metal gate layer over the high-K layer.
摘要:
A method for improving channel carrier mobility in ultra-thin Silicon-on-oxide (UTSOI) FET devices by integrating an embedded pFET SiGe extension with raised source/drain regions. The method includes selectively growing embedded SiGe (eSiGe) extensions in pFET regions and forming strain-free raised Si or SiGe source/drain (RSD) regions on CMOS. The eSiGe extension regions enhance hole mobility in the pFET channels and reduce resistance in the pFET extensions. The strain-free raised source/drain regions reduce contact resistance in both UTSOI pFETs and nFETs.