摘要:
A method of fabricating an integrated circuit with ultra-shallow source/drain junctions utilizes a dummy or sacrificial gate structure. Dopants are provided through the openings associated with sacrificial spacers to form the source and drain extensions. The openings can be filled with spacers The process can be utilized for P-channel or N-channel metal oxide field semiconductor effect transistors (MOSFETS).
摘要:
A double-gate semiconductor device includes a substrate, an insulating layer, a fin and two gates. The insulating layer is formed on the substrate and the fin is formed on the insulating layer. A first gate is formed on the insulating layer and is located on one side of the fin. A portion of the first gate includes conductive material doped with an n-type dopant. The second gate is formed on the insulating layer and is located on the opposite side of the fin as the first gate. A portion of the second gate includes conductive material doped with a p-type dopant.
摘要:
A semiconductor-on-insulator (SOI) wafer. The wafer includes a silicon substrate, a buried oxide (BOX) layer disposed on the substrate, and an active layer disposed on the box layer. The active layer has an upper silicon layer disposed on a silicon-germanium layer. The silicon-germanium layer is disposed on a lower silicon layer. The silicon-germanium of the silicon-germanium layer is strained silicon-germanium and is about 200 Å to about 400 Å thick.
摘要:
A method for forming one or more FinFET devices includes forming a source region and a drain region in an oxide layer, where the oxide layer is disposed on a substrate, and etching the oxide layer between the source region and the drain region to form a group of oxide walls and channels for a first device. The method further includes depositing a connector material over the oxide walls and channels for the first device, forming a gate mask for the first device, removing the connector material from the channels, depositing channel material in the channels for the first device, forming a gate dielectric for first device over the channels, depositing a gate material over the gate dielectric for the first device, and patterning and etching the gate material to form at least one gate electrode for the first device.
摘要:
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.
摘要:
A silicon-on-insulator (SOI) transistor. The SOI transistor having a source and a drain having a body disposed therebetween, the source being implanted with germanium to form an area of silicon-germanium adjacent a source/body junction in a lower portion of the source, the area of silicon-germanium in the source forming a hetero junction along a lower portion of the source/body junction.
摘要:
A method of forming a semiconductor-on-insulator (SOI) wafer. The method includes the steps of providing a first wafer, the first wafer having a silicon substrate and an oxide layer disposed thereon; providing a second wafer, the second wafer having a silicon substrate, the substrate of the second wafer having a silicon-germanium layer disposed thereon, a silicon layer disposed on the silicon-germanium layer and an oxide layer disposed on the silicon layer; wafer bonding the first and second wafers; and removing an undesired portion of the substrate from the second wafer to form an upper silicon layer. The resulting SOI wafer structure is also disclosed.
摘要:
The inventive method provides improved semiconductor devices, such as MOSFET's with raised source/drain extensions on a substrate with isolation trenches etched into the surface of the substrate. The inventive method provides thin first dielectric spacers on the side of a gate and gate oxide and extend from the top of the gate to the surface of the substrate. Raised source/drain extensions are placed on the surface of a substrate, which extend from the first dielectric spacers to the isolation trenches. Thicker second dielectric spacers are placed adjacent to the first dielectric spacers and extend from the top of the first dielectric spacers to the raised source/drain extensions. Raised source/drain regions are placed on the raised source/drain extensions, and extend from the isolation trenches to the second dielectric spacers. The inventive semiconductor devices provide for very shallow source drain extensions which results in a reduced short channel effect.
摘要:
A method for forming one or more FinFET devices includes forming a source region and a drain region in an oxide layer, where the oxide layer is disposed on a substrate, and etching the oxide layer between the source region and the drain region to form a group of oxide walls and channels for a first device. The method further includes depositing a connector material over the oxide walls and channels for the first device, forming a gate mask for the first device, removing the connector material from the channels, depositing channel material in the channels for the first device, forming a gate dielectric for first device over the channels, depositing a gate material over the gate dielectric for the first device, and patterning and etching the gate material to form at least one gate electrode for the first device.
摘要:
A method of forming multiple fins in a semiconductor device includes forming a structure having an upper surface and side surfaces on the semiconductor device. The semiconductor device includes a conductive layer located below the structure. The method also includes forming spacers adjacent the structure and selectively etching the spacers and the conductive layer to form the fins. The fins may be used in a FinFET device.