摘要:
The present disclosure provides a method of fabricating a semiconductor device, a semiconductor device fabricated by such a method, and a chemical mechanical polishing (CMP) tool for performing such a method. In one embodiment, a method of fabricating a semiconductor device includes providing an integrated circuit (IC) wafer including a metal conductor in a trench of a dielectric layer over a substrate, and performing a chemical mechanical polishing (CMP) process to planarize the metal conductor and the dielectric layer. The method further includes cleaning the planarized metal conductor and dielectric layer to remove residue from the CMP process, rinsing the cleaned metal conductor and dielectric layer with an alcohol, and drying the rinsed metal conductor and dielectric layer in an inert gas environment.
摘要:
A method of fabricating a gate of a semiconductor device is provided. In an embodiment, the method includes forming a gate dielectric layer on a semiconductor substrate. An interface layer is formed on the gate dielectric layer. In an embodiment, the gate dielectric layer includes HfO2 and the interface layer includes Hf—N. A work function metal layer may be formed on the interface layer. A device is also provided.
摘要:
The present disclosure provides an apparatus for fabricating a semiconductor device. The apparatus includes a polishing head that is operable to perform a polishing process to a wafer. The apparatus includes a retaining ring that is rotatably coupled to the polishing head. The retaining ring is operable to secure the wafer to be polished. The apparatus includes a soft material component located within the retaining ring. The soft material component is softer than silicon. The soft material component is operable to grind a bevel region of the wafer during the polishing process. The apparatus includes a spray nozzle that is rotatably coupled to the polishing head. The spray nozzle is operable to dispense a cleaning solution to the bevel region of the wafer during the polishing process.
摘要:
A method includes establishing an initial shot layout in which a number of shots are arranged in vertically aligned columns and horizontally aligned rows to cover a semiconductor wafer. At least one of a row of shots or a column of shots is shifted relative to an adjacent row or column of shots to establish at least one additional shot layout that differs from the initial shot layout in that shots in the at least one shifted row or column of shots are not aligned with the shots in the adjacent row or column of shots with which they were aligned in the initial shot layout. One of the initial shot layout and the at least one additional shot layout is selected as a final shot layout. The wafer is exposed to light using the final shot layout.
摘要:
An apparatus comprises an ionization chamber for providing ions during a process of ion implantation, and an electron beam source device inside the ionization chamber. The electron beam source device comprises a field emission array having a plurality of emitters for generating electrons in vacuum under an electric field.
摘要:
A semiconductor structure with a metal gate structure includes a first type field-effect transistor having a first gate including: a high k dielectric material on a substrate, a first metal layer on the high k dielectric material layer and having a first work function, and a first aluminum layer on the first metal layer. The first aluminum layer includes an interfacial layer including aluminum, nitrogen and oxygen. The device also includes a second type field-effect transistor having a second gate including: the high k dielectric material on the substrate, a second metal layer on the high k dielectric material layer and having a second work function different from the first work function, and a second aluminum layer on the second metal layer.
摘要:
The present disclosure also provides another embodiment of a method for making metal gate stacks. The method includes forming a first dummy gate and a second dummy gate on a substrate; removing a polysilicon layer from the first dummy gate, resulting in a first gate trench; forming a first metal layer and a first aluminum layer in the first gate trench; applying a chemical mechanical polishing (CMP) process to the substrate; performing an annealing process to the first aluminum layer using a nitrogen and oxygen containing gas, forming an interfacial layer of aluminum, nitrogen and oxygen on the first aluminum layer; thereafter removing the polysilicon layer from the second dummy gate, resulting in a second gate trench; and forming a second metal layer and a second aluminum layer on the second metal layer in the second gate trench.
摘要:
The described embodiments of methods of bottom-up metal deposition to fill interconnect and replacement gate structures enable gap-filling of fine features with high aspect ratios without voids and provide metal films with good film quality. In-situ pretreatment of metal film(s) deposited by gas cluster ion beam (GCIB) allows removal of surface impurities and surface oxide to improve adhesion between an underlying layer with the deposited metal film(s). Metal films deposited by photo-induced chemical vapor deposition (PI-CVD) using high energy of low-frequency light source(s) at relatively low temperature exhibit liquid-like nature, which allows the metal films to fill fine feature from bottom up. The post deposition annealing of metal film(s) deposited by PI-CVD densifies the metal film(s) and removes residual gaseous species from the metal film(s). For advanced manufacturing, such bottom-up metal deposition methods address the challenges of gap-filling of fine features with high aspect ratios.
摘要:
The present disclosure also provides another embodiment of a method for making metal gate stacks. The method includes forming a first dummy gate and a second dummy gate on a substrate; removing a polysilicon layer from the first dummy gate, resulting in a first gate trench; forming a first metal layer and a first aluminum layer in the first gate trench; applying a chemical mechanical polishing (CMP) process to the substrate; performing an annealing process to the first aluminum layer using a nitrogen and oxygen containing gas, forming an interfacial layer of aluminum, nitrogen and oxygen on the first aluminum layer; thereafter removing the polysilicon layer from the second dummy gate, resulting in a second gate trench; and forming a second metal layer and a second aluminum layer on the second metal layer in the second gate trench.
摘要:
The present disclosure provides an integrated circuit. The integrated circuit includes a semiconductor substrate having a first region and a second region; a first gate stack of an n-type field-effect transistor (FET) in the first region; and a second gate stack of a p-type FET in the second region. The first gate stack includes a high k dielectric layer on the semiconductor substrate, a first crystalline metal layer in a first orientation on the high k dielectric layer, and a conductive material layer on the first crystalline metal layer. The second gate stack includes the high k dielectric layer on the semiconductor substrate, a second crystalline metal layer in a second orientation on the high k dielectric layer, and the conductive material layer on the second crystalline metal layer.