Abstract:
A hybrid substrate having a high-mobility surface for use with planar and/or multiple-gate metal oxide semiconductor field effect transistors (MOSFETs) is provided. The hybrid substrate has a first surface portion that is optimal for n-type devices, and a second surface portion that is optimal for p-type devices. Due to proper surface and wafer flat orientations in each semiconductor layers of the hybrid substrate, all gates of the devices are oriented in the same direction and all channels are located on the high mobility surface. The present invention also provides for a method of fabricating the hybrid substrate as well as a method of integrating at least one planar or multiple-gate MOSFET thereon.
Abstract:
A method of fabricating a semiconductor device structure, includes: providing a substrate, providing an electrode on the substrate, forming a recess in the electrode, the recess having an opening, disposing a small grain semiconductor material within the recess, covering the opening to contain the small grain semiconductor material, within the recess, and then annealing the resultant structure.
Abstract:
A semiconductor device and method of manufacture provide an n-channel field effect transistor (nFET) having a shallow trench isolation with overhangs that overhang Si-SiO2 interfaces in a direction parallel to the direction of current flow and in a direction transverse to current flow. The device and method also provide a p-channel field effect transistor (pFET) having a shallow trench isolation with an overhang that overhangs Si-SiO2 interfaces in a direction transverse to current flow. However, the shallow trench isolation for the pFET is devoid of overhangs, in the direction parallel to the direction of current flow.
Abstract:
A stressed film applied across a boundary defined by a structure or a body (e.g. substrate or layer ) of semiconductor material provides a change from tensile to compressive stress in the semiconductor material proximate to the boundary and is used to modify boron diffusion rate during annealing and thus modify final boron concentrations and/or profiles/gradients. In the case of a field effect transistor, the gate structure may be formed with or without sidewalls to regulate the location of the boundary relative to source/drain, extension and/or halo implants. Different boron diffusion rates can be produced in the lateral and vertical directions and diffusion rates comparable to arsenic can be achieved. Reduction of junction capacitance of both nFETs and pFETs can be achieved simultaneously with the same process steps.
Abstract:
PROBLEM TO BE SOLVED: To provide a reliable process for achieving selectivity for selectively etching spacer/side wall material on fin against spacer/side wall material on a gate stack of finFET structure in an integrated circuit. SOLUTION: A spacer material is deposited in conformal manner on both fin and gate stack. Inclined impurity injection is performed almost parallel to the gate stack so that only the spacer material deposited on the fin is selectively damaged. Thus, such finFET is provided as covers a part of fin of the semiconductor material formed on a substrate and contains a spacer having substantially uniform profile along the length of the gate stack. By a damage caused by inclined injection, the spacer material on the fin can be so etched as has a higher selectivity than the spacer material on the gate stack. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide an integrated semiconductor device formed on a substrate having different crystal orientation. SOLUTION: A method of forming a hybrid substrate containing strained Si and a strained Si containing hybrid substrate formed by this method are provided. In the present invention, a strained Si layer is formed on a semiconductor material, a second semiconductor layer, or both of them. According to the present invention, the strained Si layer has the same crystal orientation as either of a regrown semiconductor layer or the second semiconductor layer. This method provides the hybrid substrate wherein at least one of device layers contains the strained Si. COPYRIGHT: (C)2006,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide an FET device in which the gate activity, line resistance and S/D extension resistance are improved. SOLUTION: A method for manufacturing a semiconductor transistor device is provided with following steps: a semiconductor substrate is formed; the semiconductor substrate has a gate dielectric layer on its surface; lower gate electrode structure is formed on the surface of the gate dielectric layer and the lower gate electrode structure has a low gate upper surface; a planarized layer is formed on the gate dielectric layer so that the upper part of the lower gate electrode structure is left in an exposed state; upper gate structure is formed on the lower gate electrode structure to form a T-type gate electrode; the lower surface of the upper gate structure and the vertical sidewall of the gate electrode are exposed; the planarized layer is removed; a source/drain extension is formed in the substrate protected from a short channel effect; a sidewall spacer is formed adjacent to the exposed lower surface of the upper gate and the exposed vertical sidewall of the T-type gate electrode. A source/drain region is formed in the substrate. A silicide layer is formed on the upper part of the T-type gate electrode and the upper part of the source/drain region. COPYRIGHT: (C)2004,JPO&NCIPI
Abstract:
Semiconductor structures, such as, for example, field effect transistors (FETs) and/or metal- oxide-semiconductor capacitor (MOSCAPs), are provided in which the workfunction of a conductive electrode stack is changed by introducing metal impurities into a metal-containing material layer which, together with a conductive electrode, is present in the electrode stack. The choice of metal impurities depends on whether the electrode is to have an n-type workfunction or a p-type workfunction. The present invention also provides a method of fabricating such semiconductor structures. The introduction of metal impurities can be achieved by codeposition of a layer containing both a metal-containing material and workfunction altering metal impurities, forming a stack in which a layer of metal impurities is present between layers of a metal-containing material, or by forming a material layer including the metal impurities above and/or below a metal-containing material and then heating the structure so that the metal impurities are introduced into the metal-containing material.