摘要:
When forming sophisticated SOI devices, a substrate diode and a film diode are formed by using one and the same implantation mask for determining the well dopant concentration in the corresponding well regions. Consequently, during the further processing, the well dopant concentration of any transistor elements may be achieved independently from the well regions of the diode in the semiconductor layer.
摘要:
An efficient strain-inducing mechanism may be implemented in the form of differently stressed material layers that are formed above transistors of different types. The strain-inducing dielectric materials may be formed so as to be in direct contact with the corresponding transistors, thereby enhancing the overall strain transfer efficiency. Moreover, the disclosed manufacturing strategy avoids or at least significantly reduces any interaction of reactive etch atmospheres used to pattern the strain-inducing material layers with metal silicide regions, which may be formed individually for each type of transistor.
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:
A HKMG device with PMOS eSiGe source/drain regions is provided. Embodiments include forming first and second HKMG gate stacks on a substrate, forming a nitride liner and oxide spacers on each side of each HKMG gate stack, performing halo/extension implants at each side of each HKMG gate stack, forming an oxide liner and nitride spacers on the oxide spacers of each HKMG gate stack, forming deep source/drain regions at opposite sides of the second HKMG gate stack, forming an oxide hardmask over the second HKMG gate stack, forming embedded silicon germanium (eSiGe) at opposite sides of the first HKMG gate stack, and removing the oxide hardmask.
摘要:
Lithographic limitations on gate and induced channel length in MOSFETS are avoided by forming non-planar MOSFETS in a cavity extending into a semiconductor substrate. The gate insulator and channel region lie proximate a cavity sidewall having angle α preferably about ≧90 degrees with respect to the semiconductor surface. The channel length depends on the bottom depth of the cavity and the depth from the surface of a source or drain region adjacent the cavity. The corresponding drain or source lies at the cavity bottom. The cavity sidewall extends therebetween. Neither depth is lithographic dependent. Very short channels can be consistently formed, providing improved performance and manufacturing yield. Source, drain and gate connections are brought to the same surface so that complex circuits can be readily constructed. The source and drain regions are preferably formed epitaxially and strain inducing materials can be used therein to improve channel carrier mobility.
摘要:
The drain and source regions may at least be partially formed by in situ doped epitaxially grown semiconductor materials for complementary transistors in sophisticated semiconductor devices designed for low power and high performance applications. To this end, cavities may be refilled with in situ doped semiconductor material, which in some illustrative embodiments also provides a desired strain in the channel regions of the complementary transistors.
摘要:
Methods for fabricating integrated circuits having substrate contacts and integrated circuits having substrate contacts are provided. One method includes forming a first trench in a SOI substrate extending through a buried insulating layer to a silicon substrate. A metal silicide region is formed in the silicon substrate exposed by the first trench. A first stress-inducing layer is formed overlying the metal silicide region. A second stress-inducing layer is formed overlying the first stress-inducing layer. An ILD layer of dielectric material is formed overlying the second stress-inducing layer. A second trench is formed extending through the ILD layer and the first and second stress-inducing layers to the metal silicide region. The second trench is filled with a conductive material.
摘要:
One illustrative method disclosed herein involves forming first and second gate structures that include a cap layer for a first transistor device and a second transistor device, respectively, wherein the first and second transistors are oriented transverse to one another, performing a first halo ion implant process to form first halo implant regions for the first transistor with the cap layer in position in the first gate structure of the first transistor, removing the cap layer from at least the second gate structure of the second transistor and, after removing the cap layer, performing a second halo ion implant process to form second halo implant regions for the second transistor, wherein the first and second halo implant processes are performed at transverse angles relative to the substrate.
摘要:
One illustrative method disclosed herein involves forming first and second gate structures that include a cap layer for a first transistor device and a second transistor device, respectively, wherein the first and second transistors are oriented transverse to one another, performing a first halo ion implant process to form first halo implant regions for the first transistor with the cap layer in position in the first gate structure of the first transistor, removing the cap layer from at least the second gate structure of the second transistor and, after removing the cap layer, performing a second halo ion implant process to form second halo implant regions for the second transistor, wherein the first and second halo implant processes are performed at transverse angles relative to the substrate.
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.