摘要:
A semiconductor structure including a bi-layer nFET embedded stressor element is disclosed. The bi-layer nFET embedded stressor element can be integrated into any CMOS process flow. The bi-layer nFET embedded stressor element includes an implant damaged free first layer of a first epitaxy semiconductor material having a lattice constant that is different from a lattice constant of a semiconductor substrate and imparts a tensile strain in a device channel of an nFET gate stack. Typically, and when the semiconductor is composed of silicon, the first layer of the bi-layer nFET embedded stressor element is composed of Si:C. The bi-layer nFET embedded stressor element further includes a second layer of a second epitaxy semiconductor material that has a lower resistance to dopant diffusion than the first epitaxy semiconductor material. Typically, and when the semiconductor is composed of silicon, the second layer of the bi-layer nFET embedded stressor element is composed of silicon. Only the second layer of the bi-layer nFET embedded stressor element includes the implanted source/drain 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:
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 method for forming a field effect device includes forming a gate portion on a silicon-on-insulator layer (SOI), forming first spacer members on the SOI layer adjacent to the gate portion, depositing a layer of spacer material on the SOI layer, the first spacer members, and the gate portion, removing portions of the layer of spacer material to form second spacer members on the SOI layer adjacent to the first spacer members, forming a source region and a drain region on the SOI layer by implanting ions in the SOI layer, and etching to remove the second spacer members.
摘要:
A metal oxide semiconductor field effect transistor (MOSFET) structure that includes multiple and distinct self-aligned silicide contacts and methods of fabricating the same are provided. The MOSFET structure includes at least one metal oxide semiconductor field effect transistor having a gate conductor including a gate edge located on a surface of a Si-containing substrate; a first inner silicide having an edge that is substantially aligned to the gate edge of the at least one metal oxide semiconductor field effect transistor; and a second outer silicide located adjacent to the first inner silicide. In accordance with the present invention, the second outer silicide has second thickness is greater than the first thickness of the first inner silicide. Moreover, the second outer silicide has a resistivity that is lower than the resistivity of the first inner silicide.
摘要:
In one embodiment, the invention is a method for fabricating an ultra thin silicon on insulator. One embodiment of a method for fabricating an ultra thin silicon on insulator includes providing a silicon layer, saturating the silicon layer with at least one reactant gas at a first temperature, the first temperature being low enough to substantially prevent the occurrence of any reactions involving the reactant gas, and raising the first temperature to a second temperature, the second temperature being approximately a dissociation temperature of the reactant gas.
摘要:
A self-aligned carbon-nanotube field effect transistor semiconductor device comprises a carbon-nanotube deposited on a substrate, a source and a drain formed at a first end and a second end of the carbon-nanotube, respectively, and a gate formed substantially over a portion of the carbon-nanotube, separated from the carbon-nanotube by a dielectric film.
摘要:
A semiconductor structure for use as a template for forming high-performance metal oxide semiconductor field effect transistor (MOSFET) devices is provided. More specifically, the present invention provides a structure that includes a SiGe-on-insulator substrate including a tensile-strained SiGe alloy layer located atop an insulating layer; and a strained Si layer atop the tensile-strained SiGe alloy layer. The present invention also provides a method of forming the tensile-strained SGOI substrate as well as the heterostructure described above. The method of the present invention decouples the preference for high strain in the strained Si layer and the Ge content in the underlying layer by providing a tensile-strained SiGe alloy layer directly atop on an insulating layer.
摘要:
A metal oxide semiconductor field effect transistor (MOSFET) structure that includes multiple and distinct self-aligned silicide contacts and methods of fabricating the same are provided. The MOSFET structure includes at least one metal oxide semiconductor field effect transistor having a gate conductor including a gate edge located on a surface of a Si-containing substrate; a first inner silicide having an edge that is substantially aligned to the gate edge of the at least one metal oxide semiconductor field effect transistor; and a second outer silicide located adjacent to the first inner silicide. In accordance with the present invention, the second outer silicide has second thickness is greater than the first thickness of the first inner silicide. Moreover, the second outer silicide has a resistivity that is lower than the resistivity of the first inner silicide.
摘要:
A self-aligned carbon-nanotube field effect transistor semiconductor device comprises a carbon-nanotube deposited on a substrate, a source and a drain formed at a first end and a second end of the carbon-nanotube, respectively, and a gate formed substantially over a portion of the carbon-nanotube, separated from the carbon-nanotube by a dielectric film.