摘要:
A semiconductor device includes a substrate, a first device situated on the substrate, the first device including a source and a drain each situated extending a first depth within the substrate, and a second device situated on the substrate, the second device including a source and a drain each situated extending a second depth within the substrate, the second depth not equal to the first depth.
摘要:
An SOI device (100) has a gate electrode with one or more additional gate regions (120), and oxygen or halogen ions (128) under the additional gate regions (120). The oxygen or halogen ions (128) form thicker gate oxide regions or shallow trench isolation regions.
摘要:
A diffusion layer for semiconductor devices is provided. In accordance with embodiments of the present invention, a semiconductor device, such as a transistor, comprises doped regions surrounded by a diffusion barrier. The diffusion barrier may be formed by recessing regions of the substrate and implanting fluorine or carbon ions. A silicon layer may be epitaxially grown over the diffusion barrier in the recessed regions. Thereafter, the recessed regions may be filled and doped with a semiconductor or semiconductor alloy material. In an embodiment, a semiconductor alloy material, such as silicon carbon, is selected to induce a tensile stress in the channel region for an NMOS device, and a semiconductor alloy material, such as silicon germanium, is selected to induce a compressive stress in the channel region for a PMOS device.
摘要:
A semiconductor device includes a substrate, a first device situated on the substrate, the first device including a source and a drain each situated extending a first depth within the substrate, and a second device situated on the substrate, the second device including a source and a drain each situated extending a second depth within the substrate, the second depth not equal to the first depth.
摘要:
Field effect transistors having reduced reverse body effects and reduced parasitic junction capacitance and a method of manufacture. The FET's comprise source/drain region pairs formed in said bulk silicon, each pair separated by a channel region. The depletion region associated with each of the source/drain regions of a pair are fully merged by selective ion implantation. A gate electrode is formed or deposited over the channel region of each FET in the normal manner.
摘要:
Stress in a silicon nitride contact etch stop layer on a CMOS structure having NMOS and PMOS devices is selectively relieved by selective implantation of oxygen-containing or carbon-containing ions resulting in there being no tensile stress in areas of the layer above the PMOS devices and no compressive stress in areas of the layer above the NMOS devices.
摘要:
A semiconductor structure and a method for forming the same are provided. The semiconductor structure includes a gate dielectric over a substrate, a gate electrode over the gate dielectric, a slim gate spacer along a side of the gate electrode, and a source/drain region substantially aligned with an edge of the slim gate spacer. The source/drain region includes a first implantation region having an overlap with the gate electrode, a second implantation region further away from the channel region than the first implantation region, and a third implantation region further away from the channel region than the second implantation region. The source/drain region preferably further comprises an epitaxy region spaced apart from the slim gate spacer.
摘要:
An MOS device includes a gate stack overlying a semiconductor substrate and a graded source/drain region adjacent to the gate stack. The graded source/drain region includes a first grade having a first depth, a second grade spaced further apart from a channel region than the first grade, and a third grade spaced further apart from the channel region than the second grade. The depth of the second grade is between the respective depths of the first and the third grades. The MOS device further includes a silicide region on a top surface of the source/drain region wherein the silicide region has an inner edge substantially aligned with an inner edge of the third grade, and a graded gate spacer comprising an inner portion on a sidewall of the gate stack and an outer portion on a sidewall of the inner portion.
摘要:
A strained channel MOSFET device with improved charge carrier mobility and method for forming the same, the method including providing a first and second FET device having a respective first polarity and second polarity opposite the first polarity on a substrate; forming a strained layer having a stress selected from the group consisting of compressive and tensile on the first and second FET devices; and, removing a thickness portion of the strained layer over one of the first and second FET devices to improve charge carrier mobility.
摘要:
A method of forming a source/drain having a reduced junction capacitance and a transistor employing the same. In one embodiment, the method of forming the source/drain includes forming a recess in a substrate adjacent a gate of the transistor and forming a deep doped region below a bottom surface of the recess. The method also includes epitaxially growing a semiconductor material within the recess and forming a lightly doped drain region adjacent the gate.