Abstract:
A method to form a strain-inducing semiconductor region comprising three or more species of charge-neutral lattice-forming atoms is described. In one embodiment, formation of a strain-inducing semiconductor region, comprising three or more species of charge-neutral lattice-forming atoms, laterally adjacent to a crystalline substrate results in a uniaxial strain imparted to the crystalline substrate. Thus, a strained crystalline substrate may be provided. In another embodiment, a semiconductor region with a crystalline lattice of three or more species of charge-neutral lattice-forming atoms imparts a strain to a crystalline substrate, wherein the lattice constant of the semiconductor region is different from that of the crystalline substrate.
Abstract:
A multi-gate device having a T-shaped gate structure is generally described. In one example, an apparatus includes a semiconductor substrate, at least one multi-gate fin coupled with the semiconductor substrate, the multi-gate fin having a gate region, a source region, and a drain region, the gate region being positioned between the source and drain regions, a gate dielectric coupled to the gate region of the multi-gate fin, a gate electrode coupled to the gate dielectric, the gate electrode having a first thickness and a second thickness, the second thickness being greater than the first thickness, a first spacer dielectric coupled to a portion of the gate electrode having the first thickness, and a second spacer dielectric coupled to the first spacer dielectric and coupled to the gate electrode where the second spacer dielectric is coupled to a portion of the gate electrode having the second thickness.
Abstract:
In general, in one aspect, a method includes using the Germanium nanowire as building block for high performance logic, memory and low dimensional quantum effect devices. The Germanium nanowire channel and the SiGe anchoring regions are formed simultaneously through preferential Si oxidation of epitaxial Silicon Germanium epi layer. The placement of the germanium nanowires is accomplished using a Si fin as a template and the germanium nanowire is held on Si substrate through SiGe anchors created by masking the two ends of the fins. High dielectric constant gate oxide and work function metals wrap around the Germanium nanowire for gate-all-around electrostatic channel on/off control, while the Germanium nanowire provides high carrier mobility in the transistor channel region. The germanium nanowire transistors enable high performance, low voltage (low power consumption) operation of logic and memory devices.
Abstract:
Reducing external resistance of a multi-gate device by incorporation of a partial metallic fin is generally described. In one example, an apparatus includes a semiconductor substrate and one or more fins of a multi-gate transistor device coupled with the semiconductor substrate, the one or more fins having a gate region, a source region, and a drain region, the gate region being disposed between the source and drain regions where the gate region of the one or more fins includes a semiconductor material and where the source and drain regions of the one or more fins include a metal portion and a semiconductor portion, the metal portion and the semiconductor portion being coupled together.
Abstract:
Reducing external resistance of a multi-gate device using spacer processing techniques is generally described. In one example, a method includes depositing a sacrificial gate electrode to one or more multi-gate fins, the one or more multi-gate fins comprising a gate region, a source region, and a drain region, the gate region being disposed between the source and drain regions, patterning the sacrificial gate electrode such that the sacrificial gate electrode material is coupled to the gate region and substantially no sacrificial gate electrode is coupled to the source and drain regions of the one or more multi-gate fins, forming a dielectric film coupled to the source and drain regions of the one or more multi-gate fins, removing the sacrificial gate electrode from the gate region of the one or more multi-gate fins, depositing spacer gate dielectric to the gate region of the one or more multi-gate fins wherein substantially no spacer gate dielectric is deposited to the source and drain regions of the one or more multi-gate fins, the source and drain regions being protected by the dielectric film, and etching the spacer gate dielectric to completely remove the spacer gate dielectric from the gate region area to be coupled with a final gate electrode except a remaining pre-determined thickness of spacer gate dielectric to be coupled with the final gate electrode that remains coupled with the dielectric film.
Abstract:
A process capable of integrating both planar and non-planar transistors onto a bulk semiconductor substrate, wherein the channel of all transistors is definable over a continuous range of widths.
Abstract:
A method for fabricating a dual layer gate electrode having a polysilicon layer and a workfunction metal layer comprises depositing a layer of a workfunction metal on a semiconductor substrate, depositing a layer of polysilicon on the workfunction metal layer, depositing a hard mask layer on the polysilicon layer, etching the hard mask layer to form a hard mask structure defining a gate electrode, etching the polysilicon layer to remove a portion of the polysilicon layer not protected by the hard mask structure, thereby forming a polysilicon structure beneath the hard mask structure, applying a mixture of ozone and water to exposed sidewalls of the polysilicon structure, thereby forming a silicon dioxide layer on the sidewalls, and etching the workfunction metal layer to remove a portion of the workfunction metal layer not protected by the hard mask structure, thereby forming a workfunction metal structure beneath the polysilicon structure.
Abstract:
In one embodiment of the invention, oxidation of silicon in a silicon germanium/silicon lattice may convert a two dimensional array of silicon germanium pillars into a structured three dimensional quantum dot array. The array may be included in, for example, flash memory floating gate, optical detector, or quantum computing device.
Abstract:
The present invention relates to a Tunnel Field Effect Transistor (TFET), which utilizes angle implantation and amorphization to form asymmetric source and drain regions. The TFET further comprises a silicon germanium alloy epitaxial source region with a conductivity opposite that of the drain.
Abstract:
The present invention relates to a Tunnel Field Effect Transistor (TFET). which utilizes angle implantation and amorphization to form asymmetric source and drain regions. The IFET further includes a silicon germanium alloy epitaxial source region with a conductivity opposite that of the drain.