Abstract: A method for fabricating semiconductor device includes the steps of: forming a gate structure on a substrate; forming a first spacer adjacent to the gate structure, wherein the first spacer comprises silicon carbon nitride (SiCN); forming a second spacer adjacent to the first spacer, wherein the second spacer comprises silicon oxycarbonitride (SiOCN); and forming a source/drain region adjacent to two sides of the second spacer.

Abstract: A method for fabricating semiconductor device includes the steps of: forming a gate structure on a substrate; forming a first spacer adjacent to the gate structure, wherein the first spacer comprises silicon carbon nitride (SiCN); forming a second spacer adjacent to the first spacer, wherein the second spacer comprises silicon oxycarbonitride (SiOCN); and forming a source/drain region adjacent to two sides of the second spacer.

Abstract: A method for fabricating semiconductor device includes the steps of: forming a gate structure on a substrate; forming a first spacer adjacent to the gate structure, wherein the first spacer comprises silicon carbon nitride (SiCN); forming a second spacer adjacent to the first spacer, wherein the second spacer comprises silicon oxycarbonitride (SiOCN); and forming a source/drain region adjacent to two sides of the second spacer.

Abstract: A semiconductor structure includes a dielectric layer located on a substrate, wherein the dielectric layer includes nitrogen atoms, and the concentration of the nitrogen atoms in the dielectric layer is lower than 5% at a location wherein the distance between this location in the dielectric layer to the substrate is less than 20% of the thickness of the dielectric layer. Moreover, the present invention provides a semiconductor process including the following steps: a dielectric layer is formed on a substrate. Two annealing processes are performed in-situly on the dielectric layer, wherein the two annealing processes have different imported gases and different annealing temperatures.

Abstract: A semiconductor structure includes a dielectric layer located on a substrate, wherein the dielectric layer includes nitrogen atoms, and the concentration of the nitrogen atoms in the dielectric layer is lower than 5% at a location wherein the distance between this location in the dielectric layer to the substrate is less than 20% of the thickness of the dielectric layer. Moreover, the present invention provides a semiconductor process including the following steps: a dielectric layer is formed on a substrate. Two annealing processes are performed in-situly on the dielectric layer, wherein the two annealing processes have different imported gases and different annealing temperatures.

Abstract: A polysilicon layer including an amorphous polysilicon layer and a crystallized polysilicon layer is provided. The crystallized polysilicon layer is disposed on the amorphous polysilicon layer. Besides, the amorphous polysilicon layer has a first grain size, the crystallized polysilicon layer has a second grain size, and the first grain size is smaller than the second grain size. The amorphous polysilicon layer with a smaller grain size can serve as a base for the following deposition, so that the crystallized polysilicon layer formed thereon has a flatter topography, and thus, the surface roughness is reduced and the Rs uniformity within a wafer is improved.

Abstract: A method for processing a high-k dielectric layer includes the following steps. A semiconductor substrate is provided, and a high-k dielectric layer is formed thereon. The high-k dielectric layer has a crystalline temperature. Subsequently, a first annealing process is performed, and a process temperature of the first annealing process is substantially smaller than the crystalline temperature. A second annealing process is performed, and a process temperature of the second annealing process is substantially larger than the crystalline temperature.

Abstract: The method of forming a polysilicon layer is provided. A first polysilicon layer with a first grain size is formed on a substrate. A second polysilicon layer with a second grain size is formed on the first polysilicon layer. The first grain size is smaller than the second grain size. The first polysilicon layer with a smaller grain size can serve as a base for the following deposition, so that the second polysilicon layer formed thereon has a flatter topography, and thus, the surface roughness is reduced and the Rs uniformity within a wafer is improved.

Abstract: A semiconductor process includes the following steps. A substrate having a recess is provided. A decoupled plasma nitridation process is performed to nitride the surface of the recess for forming a nitrogen containing liner on the surface of the recess. A nitrogen containing annealing process is then performed on the nitrogen containing liner.

Abstract: A semiconductor process includes the following steps. A substrate is provided. A dielectric layer having a high dielectric constant is formed on the substrate, wherein the steps of forming the dielectric layer include: (a) a metallic oxide layer is formed; (b) an annealing process is performed to the metallic oxide layer; and the steps (a) and (b) are performed repeatedly. Otherwise, the present invention further provides a semiconductor structure formed by said semiconductor process.

Abstract: A semiconductor structure includes a dielectric layer located on a substrate, wherein the dielectric layer includes nitrogen atoms, and the concentration of the nitrogen atoms in the dielectric layer is lower than 5% at a location wherein the distance between this location in the dielectric layer to the substrate is less than 20% of the thickness of the dielectric layer. Moreover, the present invention provides a semiconductor process including the following steps: a dielectric layer is formed on a substrate. Two annealing processes are performed in-situly on the dielectric layer, wherein the two annealing processes have different imported gases and different annealing temperatures.

Abstract: A process for fabricating a semiconductor device is described. A silicon oxide layer is formed. A nitridation process including at least two steps is performed to nitridate the silicon oxide layer into a silicon oxynitride (SiON) layer. The nitridation process comprises a first nitridation step and a second nitridation step in sequence, wherein the first nitridation step and the second nitridation step are different in the setting of at least one parameter.

Abstract: A method for forming a gate structure includes the following steps. A substrate is provided. A silicon oxide layer is formed on the substrate. A decoupled plasma-nitridation process is applied to the silicon oxide layer so as to form a silicon oxynitride layer. A first polysilicon layer is formed on the silicon oxynitride layer. A thermal process is applied to the silicon oxynitride layer having the first polysilicon layer. After the thermal process, a second polysilicon layer is formed on the first polysilicon layer. The first polysilicon layer can protect the gate dielectric layer during the thermal process. The nitrogen atoms inside the gate dielectric layer do not lose out of the gate dielectric layer. Thus, the out-gassing phenomenon can be avoided, and a dielectric constant of the gate dielectric layer can not be changed, thereby increasing the reliability of the gate structure.

Abstract: A manufacturing method for a metal gate includes providing a substrate having at least a semiconductor device with a conductivity type formed thereon, forming a gate trench in the semiconductor device, forming a work function metal layer having the conductivity type and an intrinsic work function corresponding to the conductivity type in the gate trench, and performing an ion implantation to adjust the intrinsic work function of the work function metal layer to a target work function.

Abstract: A method for fabricating silicon dioxide layer is disclosed. The method includes the following steps. Firstly, a semiconductor substrate is provided. Next, the semiconductor substrate is cleaned with a solution containing hydrogen peroxide to form a chemical oxide layer on the semiconductor substrate. Then, the chemical oxide layer is heated in no oxygen atmosphere, such that the chemical oxide layer forms a compact layer. Then, the semiconductor substrate is heated in oxygen atmosphere to form a silicon dioxide layer between the semiconductor substrate and the compact layer.

Abstract: A semiconductor process includes the following steps. A substrate having a recess is provided. A decoupled plasma nitridation process is performed to nitride the surface of the recess for forming a nitrogen containing liner on the surface of the recess. A nitrogen containing annealing process is then performed on the nitrogen containing liner.

Abstract: A semiconductor process includes the following steps. A substrate is provided. At least a fin-shaped structure is formed on the substrate and an oxide layer is formed on the substrate without the fin-shaped structure forming thereon. A thermal treatment process is performed to form a melting layer on at least a part of the sidewall of the fin-shaped structure.

Abstract: A semiconductor process includes the following steps. A substrate is provided. A dielectric layer having a high dielectric constant is formed on the substrate, wherein the steps of forming the dielectric layer include: (a) a metallic oxide layer is formed; (b) an annealing process is performed to the metallic oxide layer; and the steps (a) and (b) are performed repeatedly. Otherwise, the present invention further provides a semiconductor structure formed by said semiconductor process.

Abstract: A semiconductor process includes the following steps. A substrate is provided. At least a fin-shaped structure is formed on the substrate and an oxide layer is formed on the substrate without the fin-shaped structure forming thereon. A thermal treatment process is performed to form a melting layer on at least a part of the sidewall of the fin-shaped structure.

Abstract: A process for fabricating a semiconductor device is described. A silicon oxide layer is formed. A nitridation process including at least two steps is performed to nitridate the silicon oxide layer into a silicon oxynitride (SiON) layer. The nitridation process comprises a first nitridation step and a second nitridation step in sequence, wherein the first nitridation step and the second nitridation step are different in the setting of at least one parameter.