摘要:
In transistors requiring a high compressive strain, the germanium contents may be increased by applying a germanium condensation technique. In some illustrative embodiments, an oxidation process is performed in the presence of a silicon/germanium material obtained on the basis of selective epitaxial growth techniques, thereby increasingly oxidizing the silicon species, while driving the germanium into the lower lying areas of the active region, which finally results in an increased germanium concentration.
摘要:
Disclosed herein are various semiconductor devices with dual metal silicide regions and to various methods of making such devices. One illustrative method disclosed herein includes the steps of forming an upper portion of a source/drain region that is positioned above a surface of a semiconducting substrate, wherein the upper portion of the source/drain region has an upper surface that is positioned above the surface of the substrate by a distance that is at least equal to a target thickness of a metal silicide region to be formed in the upper portion of the source/drain region and forming the metal silicide region in the upper portion of the source/drain region.
摘要:
A HKMG device with PMOS eSiGe source/drain regions is provided. Embodiments include forming first and second HKMG gate stacks on a substrate, each including a SiO2 cap, forming extension regions at opposite sides of the first HKMG gate stack, forming a nitride liner and oxide spacers on each side of HKMG gate stack; forming a hardmask over the second HKMG gate stack; forming eSiGe at opposite sides of the first HKMG gate stack, removing the hardmask, forming a conformal liner and nitride spacers on the oxide spacers of each of the first and second HKMG gate stacks, and forming deep source/drain regions at opposite sides of the second HKMG gate stack.
摘要:
Disclosed herein is a method of forming a semiconductor device. In one example, the method comprises forming layer of silicon germanium on a P-active region of a semiconducting substrate wherein the layer of silicon germanium has a first concentration of germanium, and performing an oxidation process on the layer of silicon germanium to increase a concentration of germanium in at least a portion of the layer of silicon germanium to a second concentration that is greater than the first concentration of germanium.
摘要:
Improved MOSFET devices are obtained by incorporating strain inducing source-drain regions whose closest facing “nose” portions underlying the gate are located at different depths from the device surface. In a preferred embodiment, the spaced-apart source-drain regions may laterally overlap. This close proximity increases the favorable impact of the strain inducing source-drain regions on the carrier mobility in an induced channel region between the source and drain. The source-drain regions are formed by epitaxially refilling asymmetric cavities etched from both sides of the gate. Cavity asymmetry is obtained by forming an initial cavity proximate only one sidewall of the gate and then etching the final spaced-apart source-drain cavities proximate both sidewalls of the gate along predetermined crystallographic directions. The finished cavities having different depths and nose regions at different heights extending toward each other under the gate, are epitaxially refilled with the strain inducing semiconductor material for the source-drain regions.
摘要:
When forming sophisticated transistors, the channel region may be provided such that the gradient of the band gap energy of the channel material may result in superior charge carrier velocity. For example, a gradient in concentration of germanium, carbon and the like may be implemented along the channel length direction, thereby obtaining higher transistor performance.
摘要:
When forming sophisticated high-k metal gate electrode structures on the basis of a replacement gate approach, superior process uniformity may be achieved by implementing at least one planarization process after the deposition of the placeholder material, such as the polysilicon material, and prior to actually patterning the gate electrode structures.
摘要:
When forming sophisticated transistors, the channel region may be provided such that the gradient of the band gap energy of the channel material may result in superior charge carrier velocity. For example, a gradient in concentration of germanium, carbon and the like may be implemented along the channel length direction, thereby obtaining higher transistor performance.
摘要:
In three-dimensional transistor configurations, such as finFETs, at least one surface of the semiconductor fin may be provided with a strained semiconductor material, which may thus have a pronounced uniaxial strain component along the current flow direction. The strained semiconductor material may be provided at any appropriate manufacturing stage, for instance, prior to actually patterning the semiconductor fins and/or after the patterning the semiconductor fins, thereby providing superior performance and flexibility in adjusting the overall characteristics of three-dimensional transistors.
摘要:
Performance and/or uniformity of sophisticated transistors may be enhanced by incorporating a carbon species in the active regions of the transistors prior to forming complex high-k metal gate electrode structures. For example, a carbon species may be incorporated by ion implantation into the active region of a P-channel transistor and an N-channel transistor after selectively forming a threshold adjusted semiconductor material for the P-channel transistor, while the active region of the N-channel transistor is still masked.