Abstract:
A shallow trench isolation region formed in a layer of semiconductor material. The shallow trench isolation region includes a trench formed in the layer of semiconductor material, the trench being defined by sidewalls and a bottom; a liner within the trench formed from a high-K material, the liner conforming to the sidewalls and bottom of the trench; and a fill section made from isolating material, and disposed within and conforming to the high-K liner. A method of forming the shallow trench isolation region is also disclosed.
Abstract:
A FinFET includes a fin formed on an insulating layer and a first gate material layer formed proximate to sides of the fin. The FinFET further includes a protective layer formed above the first gate material layer and the fin, and a second gate material layer formed above the protective layer and the fin. The second gate material layer may be formed into a gate for the fin that may be biased independently of gate(s) formed from the first gate material layer, thus providing additional design flexibility in controlling the potential in the fin during on/off switching of the FinFET.
Abstract:
A method of manufacturing a MOSFET type semiconductor device includes planarizing a gate material layer that is deposited over a channel. The planarization is performed in a multi-step process that includes an initial “rough” planarization and then a “fine” planarization. The slurry used for the finer planarization may include added material that tends to adhere to low areas of the gate material.
Abstract:
A method of manufacturing a semiconductor device may include forming a fin structure on an insulator. The fin structure may include side surfaces and a top surface. The method may also include depositing a gate material over the fin structure and planarizing the deposited gate material. An antireflective coating may be deposited on the planarized gate material, and a gate structure may be formed out of the planarized gate material using the antireflective coating.
Abstract:
A double-gate vertical MOSFET transistor is described along with an associated fabrication method. The MOSFET transistor is configured with separate gates on each side of a vertical source-drain channel that is capped by an insulation layer. The fabrication process generally comprises forming a silicon-insulator stack having a silicon fin (channel) capped with insulation. The opposing ends of the silicon-insulator stack being configured with areas capable of receiving source and drain contacts. The vertical surfaces of the silicon fin are insulated prior to the formation of gate electrodes adjacent the two opposing sides of the silicon-insulator stack. By way of example, the gate electrodes are formed by depositing a thick layer of conductive gate material over the substrate and then removing the adjoining upper portion, such as by polishing. Portions of each gate electrode are configured with areas capable of receiving a gate contact.
Abstract:
A method of manufacturing a FinFET device includes forming a fin structure on an insulating layer. The fin structure includes a conductive fin. The method also includes forming source/drain regions and forming a dummy gate over the fin. The dummy gate may be removed and the width of the fin in the channel region may be reduced. The method further includes depositing a gate material to replace the removed dummy gate.
Abstract:
Semiconductor devices comprising fully and partially depleted SOI transistors with accurately defined monocrystalline or substantially completely monocrystalline silicon source/drain extensions are fabricated by selectively pre-amorphizing intended source/drain extensions, ion implanting dopants into the pre-amorphized regions and laser thermal annealing to effect crystallization and activation of the source/drain extensions. Embodiments include forming a gate electrode over an SOI substrate with a gate dielectric layer therebetween, forming silicon nitride sidewall spacers on the side surfaces of the gate electrode, forming source/drain regions, forming a thermal oxide layer on the gate electrode and on the source/drain regions, removing the silicon nitride sidewall spacers, pre-amorphizing the intended source/drain extension regions, ion implanting impurities into the pre-amorphized regions and laser thermal annealing to crystallize the pre-amorphized regions and to activate the source/drain extensions.
Abstract:
A semiconductor device and a process for fabricating the device, the process including steps of depositing on the silicon substrate a layer comprising at least one high-K dielectric material, whereby a quantity of silicon dioxide is formed at an interface between the silicon substrate and the high-K dielectric material layer; depositing on the high-K dielectric material layer a layer of a metal; and diffusing the metal through the high-K dielectric material layer, whereby the metal reduces at least a portion of the silicon dioxide to silicon and the metal is oxidized to form a dielectric material having a K value greater than silicon dioxide. In another embodiment, the metal is implanted into the interfacial layer. A semiconductor device including such metal layer and implanted metal is also provided.
Abstract:
An integrated circuit can include gate structures designed to effect a work function of a transistor. A first set of gate structures can have a first work function and a second set of gate structures can have a second work function. The gate structures include metal layers to affect changes in the work function. The work function can affect the threshold voltage associated with the transistors. The transistor can be built on a silicon-on-insulator substrate.
Abstract:
A method of manufacturing a semiconductor device may include forming a fin structure on an insulator and forming a gate structure over a channel portion of the fin structure. The method may also include forming a sacrificial oxide layer around the gate structure and removing the gate structure to define a gate recess within the sacrificial oxide layer. A metal gate may be formed in the gate recess, and the sacrificial oxide layer may be removed.