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:
An integrated circuit system that includes: providing a PFET device including a doped epitaxial layer; and forming a source/drain extension by employing an energy source to diffuse a dopant from the doped epitaxial layer.
摘要:
Methods of forming p-channel MOSFETs use halo-implant steps that are performed relatively early in the fabrication process. These methods include forming a gate electrode having first sidewall spacers thereon, on a semiconductor substrate, and then forming a sacrificial sidewall spacer layer on the gate electrode. A mask layer then patterned on the gate electrode. The sacrificial sidewall spacer layer is selectively etched to define sacrificial sidewall spacers on the first sidewall spacers, using the patterned mask layer as an etching mask. A PFET halo-implant of dopants is then performed into portions of the semiconductor substrate that extend adjacent the gate electrode, using the sacrificial sidewall spacers as an implant mask. Following this implant step, source and drain region trenches are etched into the semiconductor substrate, on opposite sides of the gate electrode. These source and drain region trenches are then filled by epitaxially growing SiGe source and drain regions therein.
摘要:
A method for fabricating a semiconductor device includes forming an SiGe region. The SiGe region can be an embedded source and drain region, or a compressive SiGe channel layer, or other SiGe regions within a semiconductor device. The SiGe region is exposed to an SC1 solution and excess surface portions of the SiGe region are selectively removed. The SC1 etching process can be part of a rework method in which overgrowth regions of SiGe are selectively removed by exposing the SiGe to and SC1 solution maintained at an elevated temperature. The etching process is carried out for a period of time sufficient to remove excess surface portions of SiGe. The SC1 etching process can be carried out at elevated temperatures ranging from about 25° C. to about 65° C.
摘要:
Methods of forming p-channel MOSFETs use halo-implant steps that are performed relatively early in the fabrication process. These methods include forming a gate electrode having first sidewall spacers thereon, on a semiconductor substrate, and then forming a sacrificial sidewall spacer layer on the gate electrode. A mask layer is then patterned on the gate electrode. The sacrificial sidewall spacer layer is selectively etched to define sacrificial sidewall spacers on the first sidewall spacers, using the patterned mask layer as an etching mask. A PFET halo-implant of dopants is then performed into portions of the semiconductor substrate that extend adjacent the gate electrode, using the sacrificial sidewall spacers as an implant mask. Following this implant step, source and drain region trenches are etched into the semiconductor substrate, on opposite sides of the gate electrode. These source and drain region trenches are then filled by epitaxially growing SiGe source and drain regions therein.
摘要:
A method for fabricating a semiconductor device includes forming an SiGe region. The SiGe region can be an embedded source and drain region, or a compressive SiGe channel layer, or other SiGe regions within a semiconductor device. The SiGe region is exposed to an SC1 solution and excess surface portions of the SiGe region are selectively removed. The SC1 etching process can be part of a rework method in which overgrowth regions of SiGe are selectively removed by exposing the SiGe to and SC1 solution maintained at an elevated temperature. The etching process is carried out for a period of time sufficient to remove excess surface portions of SiGe. The SC1 etching process can be carried out at elevated temperatures ranging from about 25° C. to about 65° C.
摘要:
A semiconductor body is formed from a first semiconductor material, e.g., silicon. A compound semiconductor region, e.g., silicon germanium, is embedded in the semiconductor body. The compound semiconductor region includes the first semiconductor material and a second semiconductor material. The compound semiconductor region has a concentration of the second semiconductor material that varies along an interface between the side portion of the compound semiconductor region and the side portion of the semiconductor body
摘要:
A semiconductor body is formed from a first semiconductor material, e.g., silicon. A compound semiconductor region, e.g., silicon germanium, is embedded in the semiconductor body. The compound semiconductor region includes the first semiconductor material and a second semiconductor material. The compound semiconductor region has a concentration of the second semiconductor material that varies along an interface between the side portion of the compound semiconductor region and the side portion of the semiconductor body
摘要:
A semiconductor structure, particularly a gate stack, useful in field effect transistors (FETs) in which the threshold voltage thereof is controlled by introducing a fixed spatial distribution of electric charge density to the gate dielectric material and a method of forming the same are provided. nFETs and/or pFETs structures are disclosed. In accordance with the present invention, the fixed spatial distribution of electric charge density of the gate stack or FET denotes an electrical charge density that occupies space which remains substantially constant as a function of time under device operation conditions and is non-zero at least at one location within the dielectric material or at its interface with the channel, gate electrode, spacer, or any other structural elements of the device.
摘要:
Semiconductor devices and methods of manufacture thereof are disclosed. In a preferred embodiment, a method of manufacturing a semiconductor device includes providing a semiconductor wafer, forming a gate dielectric over the semiconductor wafer, and forming a gate over the gate dielectric. At least one recess is formed in the semiconductor wafer proximate the gate and the gate dielectric, at least a portion of the at least one recess extending beneath the gate. The at least one recess in the semiconductor wafer is filled with a semiconductive material.