Abstract:
The present invention provides a strained-Si structure, in which the nFET regions of the structure are strained in tension and the pFET regions of the structure are strained in compression. Broadly the strained-Si structure comprises a substrate; a first layered stack atop the substrate, the first layered stack comprising a compressive dielectric layer atop the substrate and a first semiconducting layer atop the compressive dielectric layer, wherein the compressive dielectric layer transfers tensile stresses to the first semiconducting layer, and a second layered stack atop the substrate, the second layered stack comprising an tensile dielectric layer atop the substrate and a second semiconducting layer atop the tensile dielectric layer, wherein the tensile dielectric layer transfers compressive stresses to the second semiconducting layer. The tensile dielectric layer and the compressive dielectric layer preferably comprise nitride, such as Si3N4.
Abstract:
The present invention provides a semiconductor device having dual nitride liners, which provide an increased transverse stress state for at least one FET (300) and methods for the manufacture of such a device. A first aspect of the invention provides a method for use in the manufacture of a semiconductor device comprising the steps of applying a first silicon nitride liner (360) to the device and applying a second silicon nitride liner (370) adjacent the fast silicon nitride liner, wherein at least one of the first and second silicon nitride liners induces a transverse stress in a silicon channel (330) beneath at least one of the first and second silicon nitride liner.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a structure for reducing a floating body effect in a metal oxide semiconductor field effect transistor (MOSFET) including a silicon-on-insulator (SOI) device. SOLUTION: A field effect transistor (FET) device includes: a bulk substrate; a gate insulating layer formed on the bulk substrate; source and drain regions that are formed in an active device region relating to the bulk substrate and demarcate a p/n junction section to the body region of the active device region each; and a conductive plug that is demarcated in the source region and is created within a cavity which crosses the p/n junction section in the source region and reaches the inside of the body region. In this case, the conductive plug promotes the discharge path between the body and source regions. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
A process for forming a metal silicide gate in an FET device, where the suicide is self-forming (that is, formed without the need for a separate metal/silicon reaction step), and no CMP or etchback of the silicon material is required. A first layer of silicon material (3) (polysilicon or amorphous silicon) is formed overlying the gate dielectric (2); a layer of metal (4) is then formed on the first layer (3), and a second layer of silicon (5) on the metal layer (4). A high-temperature (greater than 700 0C) processing step, such as source/drain activation anneal, is subsequently performed; this step is effective to form a silicide layer (30) above the gate dielectric (2) by reaction of the metal with silicon in the first layer. A second high-temperature processing step (such as source/drain silicidation) may be performed which is effective to form a second silicide layer (50) from silicon in the second layer (5). The thicknesses of the layers are such that in the high-temperature processing, substantially all the first layer and at least a portion of the second layer are replaced by silicide material. Accordingly, a fully suicided gate structure may be produced.
Abstract:
The present invention provides a strained-Si structure, in which the nFET regions of the structure are strained in tension and the pFET regions of the structure are strained in compression. Broadly the strained-Si structure comprises a substrate; a first layered stack atop the substrate, the first layered stack comprising a compressive dielectric layer atop the substrate and a first semiconducting layer atop the compressive dielectric layer, wherein the compressive dielectric layer transfers tensile stresses to the first semiconducting layer, and a second layered stack atop the substrate, the second layered stack comprising an tensile dielectric layer atop the substrate and a second semiconducting layer atop the tensile dielectric layer, wherein the tensile dielectric layer transfers compressive stresses to the second semiconducting layer. The tensile dielectric layer and the compressive dielectric layer preferably comprise nitride, such as Si 3 N 4 .
Abstract translation:本发明提供一种应变Si结构,其中该结构的nFET区域被拉紧并且该结构的pFET区域被压缩而变形。 广义上,应变Si结构包括基底; 所述第一层叠堆叠包括位于所述衬底顶部的压缩介电层和位于所述压缩介电层顶部的第一半导体层,其中所述压缩介电层将拉伸应力传递到所述第一半导体层,以及第二层叠堆叠 所述第二层叠堆叠包括位于所述衬底顶部的拉伸电介质层和位于所述拉伸介电层顶部的第二半导体层,其中所述拉伸介电层将压缩应力传递到所述第二半导体层。 拉伸介电层和压电介电层优选包括氮化物,例如Si 3 N 4 N 4。
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor configuration comprising a triple gate finFET and a double gate finFET both of which have different vertical dimensions, and to provide a method of fabricating the same. SOLUTION: Implant species comprising germanium is implanted in a bottom portion 33 of selected semiconductor fins 13' on which reduced vertical dimension is desired. The bottom portion 33 of the selected semiconductor fins 13' with implant species is selectively etched to a semiconductor material without the implanted species, that is, the semiconductor material in the top portion 23 of the semiconductor fin and other semiconductor fins 13 without the implanted species, thereby obtaining: finFETs with the full vertical dimension fins and a high on-current; and finFETs with reduced vertical dimension fins with a low on-current, on the same semiconductor substrate. By adjusting the depth of the implant species, the vertical dimension of the semiconductor fins can be adjusted in selected finFETs. COPYRIGHT: (C)2008,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor structure having high mobility of electrons and holes in a doping region, and to provide a method for manufacturing it. SOLUTION: The present provides a structure and a method for forming the same. The semiconductor structure comprises (a) a substrate having a top substrate surface, (b) a channel region on the top substrate surface, (c) a gate dielectric region on the top substrate surface, and (d) a gate electrode region on the top substrate surface. The channel region is electrically separated from the gate electrode region by the gate dielectric region. The semiconductor structure includes first and second source/drain regions on the top substrate surface. The channel region is arranged between the first and second source/drain regions. The channel region and the gate dielectric regions are directly and physically brought into contact with each other with an interface practically perpendicular to the top substrate surface between. Each of the first and second source/drain regions includes a crystal material, having a lattice constant and a gap different from that in the channel region. COPYRIGHT: (C)2007,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To provide a semiconductor structure including a triple gate FinFET and a double gate FinFET having fins of different vertical dimension, and to provide a manufacturing method of a semiconductor structure.SOLUTION: An injection chemical species containing germanium is injected into the bottom part 33 of a selected semiconductor fin 13' having vertical dimension desired to be reduced. The bottom part 33 of the selected semiconductor fin 13' having the injection chemical species is subjected to selective etching for a semiconductor material where the injection chemical species does not exist, i.e., the semiconductor material at the upper part 23 of the semiconductor fin, and of other semiconductor fin 13 where the injection chemical species does not exist. Consequently, a FinFET having a complete vertical dimension and a high on current, and a FinFET having a reduced vertical dimension and a low on current are obtained on the same semiconductor substrate. Vertical dimension of a semiconductor fin in a selected FinFET can be adjusted, by adjusting the depth of the injection chemical species.
Abstract:
PROBLEM TO BE SOLVED: To provide an improved metal-oxide-semiconductor field effect transistor (MOSFET) device with stress-inducing structures located at the source and drain (S/D) regions. SOLUTION: Each MOSFET comprises source and drain regions located in a semiconductor substrate. Such source and drain regions comprise recesses with one or more sidewall surfaces that are slanted in relation to an upper surface of the semiconductor substrate. A stress-inducing dielectric layer is located over the slanted sidewall surfaces of the recesses at the source and drain regions. Such MOSFETs can be readily formed by crystallographic etching of the semiconductor substrate to form the recesses with the slanted sidewall surfaces, followed by deposition of a stress-inducing dielectric layer thereover. COPYRIGHT: (C)2008,JPO&INPIT