摘要:
A CMOS semiconductor device is formed having an N-channel transistor comprising a graded junction with reduced junction capacitance. The graded junction is achieved by forming a second sidewall spacer on the gate electrode, after source/drain implantations, and ion-implanting an N-type impurity with high diffusivity, e.g., P into an A.sub.5 implant, followed by activation annealing.
摘要:
A process for forming a shallow, lightly doped region in a semiconductor device. The method comprises the steps of providing a semiconductor substrate having a surface; growing an oxide layer on the substrate, the oxide having a thickness; depositing a layer of polysilicon on the oxide; patterning the polysilicon layer and the oxide layer to provide a gate structure; and implanting into the substrate a source and a drain region about the gate structure at an angle less than 90 degrees with respect to the surface of the substrate.
摘要:
A method of fabricating a semiconductor device is provided. The method forms a fin arrangement on a semiconductor substrate, the fin arrangement comprising one or more semiconductor fin structures. The method continues by forming a gate arrangement overlying the fin arrangement, where the gate arrangement includes one or more adjacent gate structures. The method proceeds by forming an outer spacer around sidewalls of each gate structure. The fin arrangement is then selectively etched, using the gate structure and the outer spacer(s) as an etch mask, resulting in one or more semiconductor fin sections underlying the gate structure(s). The method continues by forming a stress/strain inducing material adjacent sidewalls of the one or more semiconductor fin sections.
摘要:
FinFET structures with fins having stress-inducing caps and methods for fabricating such FinFET structures are provided. In an exemplary embodiment, a method for forming stressed structures comprises forming a first stress-inducing material overlying a semiconductor material and forming spacers overlying the first stress-inducing material. The first stress-inducing material is etched using the spacers as an etch mask to form a plurality of first stress-inducing caps. The semiconductor material is etched using the plurality of first stress-inducing caps as an etch mask.
摘要:
Methods for manufacturing an integrated circuit are provided. An exemplary method comprises the step of providing a silicon substrate having a first crystalline orientation. A silicon layer having a second crystalline orientation is bonded to the silicon substrate. The second crystalline orientation is different from the first crystalline orientation. The silicon layer is etched to expose a portion of the silicon substrate and an amorphous silicon layer is deposited on the exposed portion. The amorphous silicon layer is transformed into a regrown crystalline silicon layer having the first crystalline orientation. A first field effect transistor is formed on the silicon layer and a second field effect transistor is formed on the regrown crystalline silicon layer.
摘要:
By recessing a semiconductor layer, preferably by locally oxidizing the semiconductor layer, a stress-inducing material and/or a dopant species may be introduced into the thinned semiconductor layer in the vicinity of a gate electrode structure by means of a subsequent epitaxial growth process. In particular, the stress-inducing material formed adjacent to the gate electrode structure exerts compressive or tensile stress, depending on the type of material deposited, thereby also enhancing the mobility of the charge carriers in a channel region of the transistor element.
摘要:
An integrated circuit and methods for its manufacture are provided. The integrated circuit comprises a bulk silicon substrate having a first region of crystalline orientation and a second region of crystalline orientation. A layer of silicon on insulator overlies a portion of the bulk silicon substrate. At least one field effect transistor is formed in the layer of silicon on insulator, at least one P-channel field effect transistor is formed in the second region of crystalline orientation, and at least one N-channel field effect transistor is formed in the first region of crystalline orientation.
摘要:
An insulated gate semiconductor device (100) having reduced gate resistance and a method for manufacturing the semiconductor device (100). A gate structure (112) is formed on a major surface (104) of a semiconductor substrate (102). Successive nitride spacers (118, 128) are formed adjacent the sidewalls of the gate structure (112). The nitride spacers (118, 128) are etched and recessed using a single etch to expose the upper portions (115A, 117A) of the gate structure (112). Source (132) and drain (134) regions are formed in the semiconductor substrate (102). Silicide regions (140, 142, 144) are formed on the top surface (109) and the exposed upper portions (115A, 117A) of the gate structure (112) and the source region (132) and the drain region (134). Electrodes (150, 152, 154) are formed in contact with the silicide (140, 142, 144) of the respective gate structure (112), source region (132), and the drain region (134).
摘要:
Channel carrier mobility is increased by reducing gate/gate dielectric interface roughness, thereby reducing surface scattering. Embodiments include depositing a layer of silicon by selective epitaxy prior to gate oxide formation to provide a substantially atomically smooth surface resulting in a smoother interface between the gate polysilicon and silicon oxide after oxidation.
摘要:
A local oxidation of silicon (LOCOS) process directed to forming differential field oxide thickness on a single wafer with minimized process steps and optimized planarity. When patterning the masking layer, at least two window widths are formed in the masking layer, exposing the underlying substrate and pad oxide. When one of the window widths is sufficiently small, oxidation of the substrate will be inhibited causing reduced growth and thus a reduced field oxide thickness in that window as compared to other larger windows formed in the same masking layer, creating differential field oxide thicknesses in one growth step. To optimize planarity, prior to oxidation variable depth trenches are formed in alignment with the windows so that the resulting field oxide regions are substantially planar with the substantial surface.