摘要:
The invention provides a method of small geometry gate formation on the surface of a high-K gate dielectric. The method provides for processing steps that include gate pattern trimming, gate stack etch, and removal of exposed regions of the high-K dielectric to be performed efficiently in a single etch chamber. As such, process complexity and processing costs are reduced while throughput and overall process efficiency is improved. The method includes fabricating a high-K gate dielectric etch stop dielectric layer on the surface of a silicon substrate to protect the silicon substrate from erosion during an etch step and to prove a gate dielectric. A polysilicon layer is fabricated above the high-K dielectric layer. An anti-reflective coating layer above the polysilicon layer, and a mask is fabricated above the anti-reflective coating layer to define a gate region and an erosion region. The sequence of etching steps discussed above are performed in-situ in an enclosed high density plasma etching chamber environment.
摘要:
The invention provides a method of small geometry gate formation on the surface of a high-k gate dielectric wherein process complexity and processing costs are reduced while throughput and overall process efficiency is improved. The method may utilize photolithography illumination of 157 nm, 193 nm, 248 nm, or other suitable wavelengths to mask a gate region. An aggressive mask trim may be used to reduce the mask size such that it masks a narrow gate region. A hard mask is then fabricated over the narrow gate region and the gate and high-k dielectric are etched to expose the silicon substrate. The entire etch sequence can be performed in-situ within a single gate etch chamber.
摘要:
The invention provides an integrated circuit fabricated on a semiconductor substrate. The integrated circuit comprises a first field effect transistor and a second field effect transistor. The first field effect transistor comprises a first polysilicon gate positioned above a first channel region of the substrate and isolated from the first channel region by a first dielectric layer extending the entire length of the first polysilicon gate. The first dielectric layer comprises a first dielectric material with a first dielectric constant. The second field effect transistor comprises a second polysilicon gate positioned above a second channel region on the substrate and isolated from the second channel region by a second dielectric layer extending the entire length of the second polysilicon gate. The second dielectric layer comprises a second dielectric material with a second dielectric constant. The first dielectric constant and the second dielectric constant may be different and both may be greater than the dielectric constant of silicon dioxide.
摘要:
A double gate metal-oxide semiconductor field-effect transistor (MOSFET) includes a fin, a first gate and a second gate. The first gate is formed on top of the fin. The second gate surrounds the fin and the first gate. In another implementation, a triple gate MOSFET includes a fin, a first gate, a second gate, and a third gate. The first gate is formed on top of the fin. The second gate is formed adjacent the fin. The third gate is formed adjacent the fin and opposite the second gate.
摘要:
A method of forming multiple structures in a semiconductor device includes depositing a film over a conductive layer, etching a trench in a portion of the film and forming adjacent the sidewalls of the trench. The film may then be etched, followed by an of the conductive layer to form the structures.
摘要:
A method of manufacturing a semiconductor device includes forming a gate electrode over a substrate, implanting dopants into the substrate and activating the dopants using laser thermal annealing. During annealing, the laser and substrate are moved relative to one another, and the movement of the laser and the substrate relative to one another does not pause between and during activating one portion of the source/drain regions and activating another portion of the source/drain regions. Each pulse from the laser can respectively irradiate different portions of the source/drain regions, and a spot area of the laser is less than 50 millimeter2.
摘要:
A method of manufacturing a semiconductor device may include forming a fin structure on an insulator and depositing a gate material over the fin structure. The method may also include forming a sacrificial material over the gate material and planarizing the sacrificial material. An antireflective coating may be deposited on the planarized sacrificial material. A gate structure may then be formed by etching the gate material.
摘要:
Ultra-thin gate oxides are formed by exposing the upper surface of a substrate to a pulsed laser light beam in an atmosphere containing oxygen. Embodiments include exposing a silicon substrate to a pulsed laser light beam at a radiant fluence of 0.1 to 0.8 joules/cm2 for 1 to 10 nanoseconds to form a gate oxide layer having a thickness of 3 Å to 8 Å, e.g., 3 Å to 5 Å.
摘要:
A method of manufacturing a semiconductor device includes thermal annealing source/drain regions with a laser, measuring a depth of the source/drain regions, and adjusting a parameter of the laser used in the thermal annealing process. After the laser is adjusted, the source/drain regions are laser thermal annealed again until a desired depth of the source/drain regions is obtained. An apparatus for processing a semiconductor device includes a chamber, a laser, a measuring device, and a controller. The semiconductor device is positioned within the chamber for processing. The laser is used to laser thermal anneal the semiconductor device within the chamber. The measuring device measures a depth of source/drain regions in the semiconductor device when the semiconductor device is within the chamber, and the controller receives measurement information from the measuring device and adjusts parameters of the laser.
摘要:
A method of manufacturing a MOSFET semiconductor device comprises forming a gate electrode over a substrate and a gate oxide between the gate electrode and the substrate; forming source/drain extensions in the substrate; forming first and second sidewall spacers; implanting dopants within the substrate to form source/drain regions in the substrate adjacent to the sidewalls spacers; laser thermal annealing to activate the source/drain regions; depositing a layer of nickel over the source/drain regions; and annealing to form a nickel silicide layer disposed on the source/drain regions. The source/drain extensions and sidewall spacers are adjacent to the gate electrode. The source/drain extensions can have a depth of about 50 to 300 angstroms, and the source/drain regions can have a depth of about 400 to 1000 angstroms. The annealing is at temperatures from about 350 to 500° C.