Abstract:
A method includes forming a first rectangular mesa from a layer of semiconducting material and forming a first dielectric layer around the first mesa. The method further includes forming a first rectangular mask over a first portion of the first mesa leaving an exposed second portion of the first mesa and etching the exposed second portion of the first mesa to produce a reversed T-shaped fin from the first mesa.
Abstract:
A semiconductor device includes a substrate and an insulating layer on the substrate. The semiconductor device also includes a fin structure formed on the insulating layer, where the fin structure includes first and second side surfaces, a dielectric layer formed on the first and second side surfaces of the fin structure, a first gate electrode formed adjacent the dielectric layer on the first side surface of the fin structure, a second gate electrode formed adjacent the dielectric layer on the second side surface of the fin structure, and a doped structure formed on an upper surface of the fin structure in the channel region of the semiconductor device.
Abstract:
A method forms a semiconductor device from a device that includes a first source region, a first drain region, and a first fin structure that are separated from a second source region, a second drain region, and a second fin structure by an insulating layer. The method may include forming a dielectric layer over the device and removing portions of the dielectric layer to create covered portions and bare portions. The method may also include depositing a gate material over the covered portions and bare portions, doping the first fin structure, the first source region, and the first drain region with a first material, and doping the second fin structure, the second source region, and the second drain region with a second material. The method may further include removing a portion of the gate material over at least one covered portion to form the semiconductor device.
Abstract:
A fin field effect transistor includes a fin, a source region, a drain region, a first gate electrode and a second gate electrode. The fin includes a channel. The source region is formed adjacent a first end of the fin and the drain region is formed adjacent a second end of the fin. The first gate electrode includes a first layer of metal material formed adjacent the fin. The second gate electrode includes a second layer of metal material formed adjacent the first layer. The first layer of metal material has a different work function than the second layer of metal material. The second layer of metal material selectively diffuses into the first layer of metal material via metal interdiffusion.
Abstract:
A semiconductor device includes a group of fin structures. The group of fin structures includes a conductive material and is formed by growing the conductive material in an opening of an oxide layer. The semiconductor device further includes a source region formed at one end of the group of fin structures, a drain region formed at an opposite end of the group of fin structures, and at least one gate.
Abstract:
A method of fabricating an integrated circuit with ultra-shallow source/drain junctions utilizes a solid-phase impurity source. The solid-phase impurity source can be a doped silicon dioxide layer approximately 300 nm thick. The structure is thermally annealed to drive dopants from the solid-phase impurity source into the source and drain regions. The dopants from the impurity source provide ultra-shallow source and drain extensions. The process can be utilized for P-channel or N-channel metal oxide field semiconductor effect transistors (MOSFETS).
Abstract:
A field effect transistor (FET) is formed on a silicon substrate, with a nitride gate insulator layer being deposited on the substrate and an oxide gate insulator layer being deposited on the nitride layer to insulate a gate electrode from source and drain regions in the substrate. The gate material is then removed to establish a gate void, and spacers are deposited on the sides of the void such that only a portion of the oxide layer is covered by the spacers. Then, the unshielded portion of the oxide layer is removed, thus establishing a step between the oxide and nitride layers that overlays the source and drain extensions under the gate void to reduce subsequent capacitive coupling and charge carrier tunneling between the gate and the extensions. The spacers are removed and the gate void is refilled with gate electrode material.
Abstract:
A double gate metal-oxide semiconductor field-effect transistor (MOSFET) includes a fin, a first gate and a second gate. The first gate is formed on top of the fin. The second gate surrounds the fin and the first gate. In another implementation, a triple gate MOSFET includes a fin, a first gate, a second gate, and a third gate. The first gate is formed on top of the fin. The second gate is formed adjacent the fin. The third gate is formed adjacent the fin and opposite the second gate.
Abstract:
A method for doping fin structures in FinFET devices includes forming a first glass layer on the fin structure of a first area and a second area. The method further includes removing the first glass layer from the second area, forming a second glass layer on the fin structure of the first area and the second area, and annealing the first area and the second area to dope the fin structures.
Abstract:
A semiconductor device includes a substrate and an insulating layer on the substrate. The semiconductor device also includes a fin structure formed on the insulating layer, where the fin structure includes first and second side surfaces, a dielectric layer formed on the first and second side surfaces of the fin structure, a first gate electrode formed adjacent the dielectric layer on the first side surface of the fin structure, a second gate electrode formed adjacent the dielectric layer on the second side surface of the fin structure, and a doped structure formed on an upper surface of the fin structure in the channel region of the semiconductor device.