Abstract:
Embodiments are generally directed to a semiconductor device with released source and drain. An embodiment of a method includes etching a buffer layer of a semiconductor device to form a gate trench under a gate channel portion of a channel layer of the device; filling the gate trench with an oxide material to form an oxide isolation layer; etching one or more source/drain contact trenches in an interlayer dielectric (ILD) layer for source and drain regions of the device; etching the oxide isolation layer within the one or more source/drain contact trenches to form one or more cavities under a source/drain channel in the source and drain regions, wherein the etching of each contact trench is to expose all sides of the source/drain channel; and depositing contact metal in the one or more contact trenches, including depositing the contact metal in the cavities under the source/drain channel.
Abstract:
Techniques are disclosed for resistance reduction under transistor spacers. In some instances, the techniques include reducing the exposure of source/drain (S/D) dopants to thermal cycles, thereby reducing the diffusion and loss of S/D dopants to surrounding materials. In some such instances, the techniques include delaying the epitaxial deposition of the doped S/D material until near the end of the transistor formation process flow, thereby avoiding the thermal cycles earlier in the process flow. For example, the techniques may include replacing the S/D regions (e.g., native fin material in the regions to be used for the transistor S/D) with sacrificial S/D material that can then be selectively etched and replaced by highly doped epitaxial S/D material later in the process flow. In some cases, the selective etch may be performed through S/D contact trenches formed in overlying insulator material over the sacrificial S/D.
Abstract:
An apparatus includes a first fin (116) of a first transistor and a second fin (118) of a second transistor. The apparatus also include a first contact (138) coupled to the first fin and a second contact (142) coupled to the second fin. The apparatus further includes a strapped contact (164) coupled to the first contact and to the second contact.
Abstract:
A method is provided for fabricating a finFET device. Fin structures are formed over a BOX layer. The fin structures include a semiconductor layer and extend in a first direction. A gate stack is formed on the BOX layer over the fin structures and extending in a second direction. The gate stack includes a high-K dielectric layer and a metal gate. Gate spacers are formed on sidewalls of the gate stack, and an epi layer is deposited to merge the fin structures. Ions are implanted to form source and drain regions, and dummy spacers are formed on sidewalls of the gate spacers. The dummy spacers are used as a mask to recess or completely remove an exposed portion of the epi layer. Silicidation forms silicide regions that abut the source and drain regions and each include a vertical portion located on the vertical sidewall of the source or drain region.
Abstract:
The present description relates to the field of fabricating microelectronic devices having non-planar transistors. Embodiments of the present description relate to the formation of gates within non-planar NMOS transistors, wherein an NMOS work-function material, such as a composition of aluminum, titanium, and carbon, may be used in conjunction with a titanium-containing gate fill barrier to facilitate the use of a tungsten-containing conductive material in the formation of a gate electrode of the non-planar NMOS transistor gate.
Abstract:
A semiconductor device comprises a substrate and a semiconductor body formed on the substrate. The semiconductor body comprises a source region; and a drain region. The source region or the drain region, or combinations thereof, comprises a first side surface, a second side surface, and a top surface. The first side surface is opposite the second side surface, the top surface is opposite the bottom surface. The source region or the drain region, or combinations thereof, comprise a metal layer formed on the substantially all of the first side surface, substantially all of the second side surface, and the top surface.
Abstract:
Transistor a effet de champ (100) comportant : - une couche support (104), - une pluralité de zones actives (106) a base de semi-conducteur, chaque zone active étant destinée a former un canal et disposée entre deux grilles (112) situées l'une a cote de l'autre consécutivement, les zones actives et les grilles étant disposées sur Ia couche support, chaque grille comportant une première face du cote de Ia couche support et une seconde face opposée a Ia première face, - Ia seconde face d'une première des deux grilles étant reliée électriquement a un premier contact électrique (118, 122, 124) réalisé sur Ia seconde face de ladite première des deux grilles, et Ia première face d'une seconde des deux grilles étant reliée électriquement a un second contact électrique (118, 130, 132) traversant Ia couche support, les grilles du transistor n'étant pas reliées électriquement entre elles.
Abstract:
A method includes forming a semiconductor structure, the semiconductor structure includes a first current electrode region (32), a second current electrode region (34), and a channel region (37), the channel region (37) is located between the first current electrode region (32) and the second current electrode region (34), wherein the channel region (37) is located in a fin structure (36) of the semiconductor structure, wherein a carrier transport in the channel region is generally in a horizontal direction between the first current electrode region (32) and the second current electrode region (34). The method further includes forming a first contact (66), wherein forming the first contact (66) includes removing a first portion of the semiconductor structure to form an opening (54), wherein the opening (54) is in the first current electrode region (32) and forming contact material (66) in the opening.
Abstract:
The present invention is a semiconductor device comprising a semiconductor body having a top surface and laterally opposite sidewalls formed on a substrate. A gate dielectric layer is formed on the top surface of the semiconductor body and on the laterally opposite sidewalls of the semiconductor body. A gate electrode is formed on the gate dielectric on the top surface of the semiconductor body and adjacent to the gate dielectric on the laterally opposite sidewalls of the semiconductor body.