Abstract:
A semiconductor device includes a blocking structure between a metal layer and at least one underlying layer. The blocking structure has a first layer configured for preventing diffusion of metal from the metal layer into the at least one underlying layer, and a second layer configured for enhancing electrical performance of the semiconductor device.
Abstract:
The present disclosure provides a method of fabricating a semiconductor device. The method includes providing a substrate. A dummy gate is formed over the substrate. A dielectric material is formed around the dummy gate. The dummy gate is then removed to form an opening in the dielectric material. Thereafter, a work function metal layer is formed to partially fill the opening. The remainder of the opening is then filled with a conductive layer using one of a polysilicon substitute method and a spin coating method.
Abstract:
A semiconductor device includes a blocking structure between a metal layer and at least one underlying layer. The blocking structure has a first layer configured for preventing diffusion of metal from the metal layer into the at least one underlying layer, and a second layer configured for enhancing electrical performance of the semiconductor device.
Abstract:
The present disclosure provides a method of fabricating a semiconductor device. The method includes providing a substrate. A dummy gate is formed over the substrate. A dielectric material is formed around the dummy gate. The dummy gate is then removed to form an opening in the dielectric material. Thereafter, a work function metal layer is formed to partially fill the opening. The remainder of the opening is then filled with a conductive layer using one of a polysilicon substitute method and a spin coating method.
Abstract:
The present disclosure provides various methods of fabricating a semiconductor device. A method of fabricating a semiconductor device includes providing a semiconductor substrate and forming a gate structure over the substrate. The gate structure includes a first spacer and a second spacer formed apart from the first spacer. The gate structure also includes a dummy gate formed between the first and second spacers. The method also includes removing a portion of the dummy gate from the gate structure thereby forming a partial trench. Additionally, the method includes removing a portion of the first spacer and a portion of the second spacer adjacent the partial trench thereby forming a widened portion of the partial trench. In addition, the method includes removing a remaining portion of the dummy gate from the gate structure thereby forming a full trench. A high k film and a metal gate are formed in the full trench.
Abstract:
The present disclosure provides various methods of fabricating a semiconductor device. A method of fabricating a semiconductor device includes providing a semiconductor substrate and forming a gate structure over the substrate. The gate structure includes a first spacer and a second spacer formed apart from the first spacer. The gate structure also includes a dummy gate formed between the first and second spacers. The method also includes removing a portion of the dummy gate from the gate structure thereby forming a partial trench. Additionally, the method includes removing a portion of the first spacer and a portion of the second spacer adjacent the partial trench thereby forming a widened portion of the partial trench. In addition, the method includes removing a remaining portion of the dummy gate from the gate structure thereby forming a full trench. A high k film and a metal gate are formed in the full trench.
Abstract:
An exemplary method for fabricating a metal gate electrode includes providing a substrate having thereon a dielectric layer and a trench in the dielectric layer; depositing a work-function metal layer over the dielectric layer and into the trench; depositing a sacrificial layer over the work-function metal layer to fill the first trench; performing a chemical mechanical polishing to remove the work-function metal layer outside the trench; removing the sacrificial layer in the trench; and depositing a signal metal layer to fill the trench.
Abstract:
A semiconductor device includes a substrate, a gate dielectric layer on the substrate, and a gate electrode stack on the gate dielectric layer. The gate electrode stack includes a metal filling line, a wetting layer, a metal diffusion blocking layer, and a work function layer. The wetting layer is in contact with a sidewall and a bottom surface of the metal filling line. The metal diffusion blocking layer is in contact with the wetting layer and covers the sidewall and the bottom surface of the metal filling line with the wetting layer therebetween. The work function layer covers the sidewall and the bottom surface of the metal filling line with the wetting layer and the metal diffusion blocking layer therebetween.
Abstract:
A device includes a conductive layer including a bottom portion, and a sidewall portion over the bottom portion, wherein the sidewall portion is connected to an end of the bottom portion. An aluminum-containing layer overlaps the bottom portion of the conductive layer, wherein a top surface of the aluminum-containing layer is substantially level with a top edge of the sidewall portion of the conductive layer. An aluminum oxide layer is overlying the aluminum-containing layer. A copper-containing region is over the aluminum oxide layer, and is spaced apart from the aluminum-containing layer by the aluminum oxide layer. The copper-containing region is electrically coupled to the aluminum-containing layer through the top edge of the sidewall portion of the conductive layer.
Abstract:
A device includes a conductive layer including a bottom portion, and a sidewall portion over the bottom portion, wherein the sidewall portion is connected to an end of the bottom portion. An aluminum-containing layer overlaps the bottom portion of the conductive layer, wherein a top surface of the aluminum-containing layer is substantially level with a top edge of the sidewall portion of the conductive layer. An aluminum oxide layer is overlying the aluminum-containing layer. A copper-containing region is over the aluminum oxide layer, and is spaced apart from the aluminum-containing layer by the aluminum oxide layer. The copper-containing region is electrically coupled to the aluminum-containing layer through the top edge of the sidewall portion of the conductive layer.