摘要:
A method for forming an integrated circuit is provided. The method includes forming a gate dielectric structure over a substrate. A titanium-containing sacrificial layer is formed, contacting the gate dielectric structure. The whole titanium-containing sacrificial layer is substantially removed.
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 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:
A method of depositing a metal film on a substrate with patterned features includes placing a substrate with patterned features into a photo-induced chemical vapor deposition (PI-CVD) process chamber. The method also includes depositing a metal film by PI-CVD to fill the patterned features from bottom up.
摘要:
The present disclosure provides a method for fabricating a semiconductor device. The method includes providing a semiconductor substrate having a first region and a second region, forming a high-k dielectric layer over the semiconductor substrate, forming a first metal layer and a first silicon layer by an in-situ deposition process, patterning the first silicon layer to remove a portion overlying the second region, patterning the first metal layer using the patterned first silicon layer as a mask, and removing the patterned first silicon layer including applying a solution. The solution includes a first component having an [F-] concentration greater than 0.01M, a second component configured to adjust a pH of the solution from about 4.3 to about 6.7, and a third component configured to adjust a potential of the solution to be greater than −1.4 volts.
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 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 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 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.