Abstract:
A structure and method are provided in which an n-type field effect transistor (NFET) and a p-type field effect transistor (PFET) each have a channel region disposed in a single-crystal layer of a first semiconductor and a stress is applied at a first magnitude to a channel region of the PFET but not at that magnitude to the channel region of the NFET. The stress is applied by a layer of a second semiconductor which is lattice-mismatched to the first semiconductor. The layer of second semiconductor is formed over the source and drain regions and extensions of the PFET at a first distance from the channel region of the PFET and is formed over the source and drain regions of the NFET at a second, greater distance from the channel region of the NFET, or not formed at all in the NFET.
Abstract:
The present invention provides a semiconductor interconnect structure with improved mechanical strength at the interface of the capping layer (61), the underlying dielectric layer (12) and the diffusion barrier (31). The interconnect structure has a portion (41) of the diffusion barrier material (31) embedded in the capping material (61). The barrier (31) can be either partially or fully embedded in the capping layer (61).
Abstract:
The present invention relates to a semiconductor device that comprises at least one field effect transistor (FET) containing a source region, a drain region, a channel region, a gate dielectric layer, a gate electrode, and one or more gate sidewall spacers. The gate electrode of such an FET contains an intrinsically stressed gate metal silicide layer, which is laterally confined by one or more gate sidewall spacers and is arranged and constructed for creating stress in the channel region of the FET. Preferably, the semiconductor device comprises at least one p-channel FET, and more preferably, the p-channel FET has a gate electrode with an intrinsically stressed gate metal silicide layer that is laterally confined by one or more gate sidewall spacers and is arranged and constructed for creating compressive stress in the p-channel of the FET.
Abstract:
A method of processing a substrate of a device comprises the as following steps. Form a cap layer (14) over the substrate (12). Form a dummy layer (DL) over the cap layer (14), the cap layer having a top surface. Etch the dummy layer (DL) forming patterned dummy elements (DA, DB, DC) of variable widths and exposing sidewalls (3ON, 31N, 32N, 33N) of the dummy elements and portions of the top surface of the cap layer (14) aside from the dummy elements. Deposit a spacer layer (18C) over the device covering the patterned dummy elements (DA, DB, DC) and exposed surfaces of the cap layer (14). Etch back the spacer layer (18C) forming sidewall spacers (30N, 31N, 32N, 33N) aside from the sidewalls of the patterned dummy elements (DA, DB, DC) spaced above a minimum spacing and forming super-wide spacers between sidewalls of the patterned dummy elements spaced less than the minimum spacing. Strip the patterned dummy elements. Expose portions of the substrate aside from the sidewall spacers (30N, 31N, 32N, 33N). Pattern exposed portions of the substrate (12) by etching into the substrate.
Abstract:
A method of manufacturing complementary metal oxide semiconductor transistors forms different types of transistors such as N-type metal oxide semiconductor (NMOS) transistors and P-type metal oxide semiconductor (PMOS) transistors (first and second type transistors) on a substrate (12). The method forms an optional oxide layer (52) on the NMOS transistors and the PMOS transistors and then covers the NMOS transistors and the PMOS transistors with a hard material (50) such as a silicon nitride layer. Following this, the method patterns portions of the hard material layer (50), such that the hard material layer remains only over the NMOS transistors. Next, the method heats (178, 204) the NMOS transistors and then removes the remaining portions of the hard material layer (50). By creating compressive stress in the gates (22) and tensile stress (70) in the channel regions of the NMOS transistors (NFETs), without creating stress in the gates (20) or channel regions of the PMOS transistors (PFETs), the method improves performance of the NFETs without degrading performance of the PFETs.
Abstract:
A method for manufacturing a device including an n-type device and a p-type device. In an aspect of the invention, the method involves doping a portion of a semiconductor substrate (200) and forming a gap (219) in the semiconductor substrate (200) by removing at least a portion of the doped portion of the semiconductor substrate (200). The method further involves growing a strain layer (227) in at least a portion of the gap (219) in the semiconductor substrate (200). For the n-type device, the strain layer (227) is grown on at least a portion which is substantially directly under a channel of the n-type device. For the p-type device, the strain layer is grown on at least a portion which is substantially directly under a source region or drain region of the p-type device and not substantially under a channel of the p-type device.
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:
The present invention provides an improved CMOS diode structure with dual gate conductors. Specifically, a substrate comprising a first n-doped region and a second p-doped region is formed. A third region of either n-type or p-type conductivity is located between the first and second regions. A first gate conductor of n-type conductivity and a second gate conductor of p-type conductivity are located over the substrate and adjacent to the first and second regions, respectively. Further, the second gate conductor is spaced apart and isolated from the first gate conductor by a dielectric isolation structure. An accumulation region with an underlying depletion region can be formed in such a diode structure between the third region and the second or the first region, and such an accumulation region preferably has a width that is positively correlated with that of the second or the first gate conductor.
Abstract:
The present invention is directed to the formation of sublithographic features in a semi conduct or structure using self-assembling polymers The self-assembling polymers are formed in openings in a hard mask, annealed and then etched, followed by etching of the underlying dielectric material. At least one subiithograpliic feature is formed according to this method. Abo disclosed is an intermediate semiconductor structure in which at least one interconnect wiring feature has a dimension that is defined by a self-assembled block copolymer.
Abstract:
A method for manufacturing a device including an n-type device and a p-type device. In an aspect of the invention, the method involves doping a portion of a semiconductor substrate and forming a gap in the semiconductor substrate by removing at least a portion of the doped portion of the semiconductor substrate. The method further involves growing a strain layer in at least a portion of the gap in the semiconductor substrate. For the n-type device, the strain layer is grown on at least a portion which is substantially directly under a channel of the n-type device. For the p-type device, the strain layer is grown on at least a portion which is substantially directly under a source region or drain region of the p-type device and not substantially under a channel of the p-type device.