摘要:
A semiconductor device and a method of making the device are provided. The method can include forming a gate conductor overlying a major surface of a monocrystalline semiconductor region and forming first spacers on exposed walls of the gate conductor. Using the gate conductor and the first spacers as a mask, at least extension regions are implanted in the semiconductor region and dummy spacers are formed extending outward from the first spacers. Using the dummy spacers as a mask, the semiconductor region is etched to form recesses having at least substantially straight walls extending downward from the major surface to a bottom surface, such that a substantial angle is defined between the bottom surface and the walls. Subsequently, the process is continued by epitaxially growing regions of stressed monocrystalline semiconductor material within the recesses. Then the dummy spacers are removed and the transistor can be completed by forming source/drain regions of the transistor that are at least partially disposed in the stressed semiconductor material regions.
摘要:
A semiconductor device and a method of making the device are provided. The method can include forming a gate conductor overlying a major surface of a monocrystalline semiconductor region and forming first spacers on exposed walls of the gate conductor. Using the gate conductor and the first spacers as a mask, at least extension regions are implanted in the semiconductor region and dummy spacers are formed extending outward from the first spacers. Using the dummy spacers as a mask, the semiconductor region is etched to form recesses having at least substantially straight walls extending downward from the major surface to a bottom surface, such that a substantial angle is defined between the bottom surface and the walls. Subsequently, the process is continued by epitaxially growing regions of stressed monocrystalline semiconductor material within the recesses. Then the dummy spacers are removed and the transistor can be completed by forming source/drain regions of the transistor that are at least partially disposed in the stressed semiconductor material regions.
摘要:
Disclosed are embodiments of a hybrid-orientation technology (HOT) wafer and a method of forming the HOT wafer with improved shallow trench isolation (STI) structures for patterning devices in both silicon-on-insulator (SOI) regions, having a first crystallographic orientation, and bulk regions, having a second crystallographic orientation. The improved STI structures are formed using a non-selective etch process to ensure that all of the STI structures and, particularly, the STI structures at the SOI-bulk interfaces, each extend to the semiconductor substrate and have an essentially homogeneous (i.e., single material) and planar (i.e., divot-free) bottom surface that is approximately parallel to the top surface of the substrate. Optionally, an additional selective etch process can be used to extend the STI structures a predetermined depth into the substrate.
摘要:
The present invention provides an integrated semiconductor circuit containing a planar single gated FET and a FinFET located on the same SOI substrate. Specifically, the integrated semiconductor circuit includes a FinFET and a planar single gated FET located atop a buried insulating layer of an silicon-on-insulator substrate, the planar single gated FET is located on a surface of a patterned top semiconductor layer of the silicon-on-insulator substrate and the FinFET has a vertical channel that is perpendicular to the planar single gated FET. A method of forming a method such an integrated circuit is also provided. In the method, resist imaging and a patterned hard mask are used in trimming the width of the FinFET active device region and subsequent resist imaging and etching are used in thinning the thickness of the FET device area. The trimmed active FinFET device region is formed such that it lies perpendicular to the thinned planar single gated FET device region.
摘要:
Thin silicon channel SOI devices provide the advantage of sharper sub-threshold slope, high mobility, and better short-channel effect control but exhibit a typical disadvantage of increased series resistance. This high series resistance is avoided by using a raised source-drain (RSD), and expanding the source drain on the pFET transistor in the CMOS pair using selective epitaxial Si growth which is decoupled between nFETs and pFETs. By doing so, the series resistance is improved, the extensions are implanted after RSD formation and thus not exposed to the high thermal budget of the RSD process while the pFET and nFET can achieve independent effective offsets.
摘要:
Described is a method for making thin channel silicon-on-insulator structures. The inventive method comprises forming a set of thin spacer abutting a gate region in a first device and a second device region; forming a raised source/drain region on either side of the gate region in the first device region and the second device region, implanting dopants of a first conductivity type into the raised source drain region in the first device region to form a first dopant impurity region, where the second device region is protected by a second device region block mask; implanting dopants of a second conductivity type into the raised source/drain region in the second device region to form a second dopant impurity region, where the first device region is protected by a first device region block mask; and activating the first dopant impurity region and the second dopant impurity region to provide a thin channel MOSFET.
摘要:
Methods of forming complementary metal oxide semiconductor (CMOS) devices having multiple-threshold voltages which are easily tunable are provided. Total salicidation with a metal bilayer (representative of the first method of the present invention) or metal alloy (representative of the second method of the present invention) is provided. CMOS devices having multiple-threshold voltages provided by the present methods are also described.
摘要:
The present invention provides methods of forming an out-diffused bitline in a semiconductor substrate by utilizing a laser annealing step wherein the dopant material in the trench region is out-diffused into the semiconductor substrate. The out-diffused bitline can also be formed utilizing an ion implantation step.
摘要:
In one embodiment, the invention is a complementary metal-oxide-semiconductor device with an embedded stressor. One embodiment of a field effect transistor includes a silicon on insulator channel, a gate electrode coupled to the silicon on insulator channel, and a stressor embedded in the silicon on insulator channel and spaced laterally from the gate electrode, where the stressor is formed of a silicon germanide alloy whose germanium content gradually increases in one direction.
摘要:
Described is a method for making thin channel silicon-on-insulator structures. The inventive method comprises forming a set of thin spacer abutting a gate region in a first device and a second device region; forming a raised source/drain region on either side of the gate region in the first device region and the second device region, implanting dopants of a first conductivity type into the raised source drain region in the first device region to form a first dopant impurity region, where the second device region is protected by a second device region block mask; implanting dopants of a second conductivity type into the raised source/drain region in the second device region to form a second dopant impurity region, where the first device region is protected by a first device region block mask; and activating the first dopant impurity region and the second dopant impurity region to provide a thin channel MOSFET.