Abstract:
A semiconductor structure of strained MOSFETs, comprising both PMOSFETs and NMOSFETS, and a method for fabricating strained MOSFETs are disclosed that optimize strain in the MOSFETs, and more particularly maximize the strain in one kind (P or N) of MOSFET and minimize and relax the strain in another kind (N or P) of MOSFET, A strain inducing CA nitride coating having an original full thickness is formed over both the PMOSFETs and the NMOSFETs, wherein the strain inducing coating produces an optimized full strain in one kind of semiconductor device and degrades the performance of the other kind of semiconductor device. The strain inducing CA nitride coating is etched to a reduced thickness over the other kind of semiconductor devices, wherein the reduced thickness of the strain inducing coating relaxes and produces less strain in the other MOSFETs.
Abstract:
A semiconductor structure of strained MOSFETs, comprising both PMOSFETs and NMOSFETS, and a method for fabricating strained MOSFETs are disclosed that optimize strain in the MOSFETs, and more particularly maximize the strain in one kind (P or N) of MOSFET and minimize and relax the strain in another kind (N or P) of MOSFET, A strain inducing CA nitride coating having an original full thickness is formed over both the PMOSFETs and the NMOSFETs, wherein the strain inducing coating produces an optimized full strain in one kind of semiconductor device and degrades the performance of the other kind of semiconductor device. The strain inducing CA nitride coating is etched to a reduced thickness over the other kind of semiconductor devices, wherein the reduced thickness of the strain inducing coating relaxes and produces less strain in the other MOSFETs.
Abstract:
A method of forming a semiconductor device 100 having an asymmetrical source and drain. In one embodiment, the method includes forming a gate structure 15 on a first portion of the substrate 5 having a well 35 of a first conductivity. A source region 20 of a second conductivity and drain region 25 of the second conductivity is formed within the well 35 of the first conductivity in a portion of the substrate that is adjacent to the first portion of the substrate on which the gate structure is present. A doped region 30 of a second conductivity is formed within the drain region to provide an integrated bipolar transistor on a drain side of the semiconductor device, in which a collector is provided by the well of the first conductivity, the base is provided by the drain region of the second conductivity and the emitter is provided by the doped region of the second conductivity that is present in the drain region. A semiconductor device formed by the above-described method is also provided.
Abstract:
PROBLEM TO BE SOLVED: To provide the structure and manufacturing method of a high-performance electric field effect device. SOLUTION: This MOS structure is equipped with a sort of conductive crystal Si main part, SiGe layer for which epitaxial growth has been performed on the Si main part that works as a buried channel of a hole, Si layer for which epitaxial growth has been performed on the SiGe layer that works as an electronic surface channel, and source/drain which accomodates strained SiGe for which conductive epitaxial growth has been performed in a way different from the Si main part. This SiGe source/drain forms hetero-junction and metallic bonding with the Si main part by overlapping each other with a tolerance of less than about 10 nm, preferably 5 nm. This heterostructure source/drain is useful for reducing a short channel effect. The foregoing structure increases hole mobility in a compressively strained SiGe channel, and therefore it is advantageous to PMOS. In typical embodiments, CMOS structure is provided on bulk and SOI. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
PROBLEM TO BE SOLVED: To provide a MOSFET which dynamically varies the threshold voltage on an SOI. SOLUTION: When a body control contact is provided adjacent to a transistor and between the transistor and a contact to a substrate or a well in which the transistor is formed, the substrate of the transistor can be connected to and disconnected from a zero (ground) or substantially arbitrary low voltage in accordance with control signals applied to the gate of the transistor to cause the transistor to exhibit a variable threshold, resulting in good performance maintained even at low supply voltages and reduced power consumption/dissipation, which are particularly advantageous in portable electronic devices. Floating body effects (when the transistor substrate is disconnected from a voltage source in the "on" state) are avoided because the substrate is discharged when the transistor is switched to the "off" state. The transistor configuration can be used with n-type and p-type transistors in the case of complementary pairs or the like. COPYRIGHT: (C)2005,JPO&NCIPI
Abstract:
A method of reducing hot carrier degradation and a semiconductor structure so formed are disclosed. One embodiment of the method includes depositing a silicon nitride layer (40) over a transistor device (10A, 10B), ion implanting (44) a species (48) into the silicon nitride layer (40) to drive hydrogen from the silicon nitride layer (40), and annealing (60) to diffuse the hydrogen into a channel region of the transistor device (10A, 10B). The species (48) may be chosen from, for example: germanium (Ge), arsenic (As), xenon (Xe), nitrogen (N), oxygen (0), carbon (C), boron (B),indium (In), argon (Ar), helium (He), and deuterium (De). The ion implantation (44) modulates atoms in the silicon nitride layer (40) such as hydrogen, nitrogen and hydrogen-nitrogen bonds such that hydrogen can be controllably diffused into the channel region (30).
Abstract:
Process for enhancing strain in a channel with a stress liner, spacer, process for forming integrated circuit and integrated circuit. A first spacer (50) composed of a first oxide (130) and first nitride (40) layer is applied to a gate electrode (10) on a substrate (20), and a second spacer (60) composed of a second oxide (70) and a second nitride (80) layer is applied. Deep implanting of source and drain in the substrate (20) occurs, and removal of the second nitride (80), second oxide (70), and first nitride layers (40).
Abstract:
A method of forming a semiconductor device 100 having an asymmetrical source and drain. In one embodiment, the method includes forming a gate structure 15 on a first portion of the substrate 5 having a well 35 of a first conductivity. A source region 20 of a second conductivity and drain region 25 of the second conductivity is formed within the well 35 of the first conductivity in a portion of the substrate that is adjacent to the first portion of the substrate on which the gate structure is present. A doped region 30 of a second conductivity is formed within the drain region to provide an integrated bipolar transistor on a drain side of the semiconductor device, in which a collector is provided by the well of the first conductivity, the base is provided by the drain region of the second conductivity and the emitter is provided by the doped region of the second conductivity that is present in the drain region. A semiconductor device formed by the above-described method is also provided.
Abstract:
A method of reducing hot carrier degradation and a semiconductor structure so formed are disclosed. One embodiment of the method includes depositing a silicon nitride layer (40) over a transistor device (10A, 10B), ion implanting (44) a species (48) into the silicon nitride layer (40) to drive hydrogen from the silicon nitride layer (40), and annealing (60) to diffuse the hydrogen into a channel region of the transistor device (10A, 10B). The species (48) may be chosen from, for example: germanium (Ge), arsenic (As), xenon (Xe), nitrogen (N), oxygen (0), carbon (C), boron (B), indium (In), argon (Ar), helium (He), and deuterium (De). The ion implantation (44) modulates atoms in the silicon nitride layer (40) such as hydrogen, nitrogen and hydrogen-nitrogen bonds such that hydrogen can be controllably diffused into the channel region (30).