Abstract: Integrated circuit structures having source or drain structures with abrupt dopant profiles are described. In an example, an integrated circuit structure includes a vertical arrangement of horizontal nanowires. A gate stack is around the vertical arrangement of horizontal nanowires. A first epitaxial source or drain structure is at a first end of the vertical arrangement of horizontal nanowires. A second epitaxial source or drain structure is at a second end of the vertical arrangement of horizontal nanowires. The first and second epitaxial source or drain structures include silicon, phosphorous and arsenic, with an atomic concentration of phosphorous substantially the same as an atomic concentration of arsenic.

Abstract: Substrate-less vertical diode integrated circuit structures, and methods of fabricating substrate-less vertical diode integrated circuit structures, are described. For example, a substrate-less integrated circuit structure includes a semiconductor fin in a dielectric layer, the semiconductor fin having a top and a bottom, and the dielectric layer having a top surface and a bottom surface. A first epitaxial semiconductor structure is on the top of the semiconductor fin. A second epitaxial semiconductor structure is on the bottom of the semiconductor fin. A first conductive contact is on the first epitaxial semiconductor structure. A second conductive contact is on the second epitaxial semiconductor structure.

Abstract: Approaches for fabricating an integrated circuit structure including a titanium silicide material, and the resulting structures, are described. In an example, an integrated circuit structure includes a semiconductor fin above a substrate, a gate electrode over the top and adjacent to the sidewalls of a portion of the semiconductor fin. A titanium silicide material is in direct contact with each of first and second epitaxial semiconductor source or drain structures at first and second sides of the gate electrode. The titanium silicide material is conformal with and hermetically sealing a non-flat topography of each of the first and second epitaxial semiconductor source or drain structures. The titanium silicide material has a total atomic composition including 95% or greater stoichiometric TiSi2.

Abstract: Approaches for fabricating an integrated circuit structure including a titanium silicide material, and the resulting structures, are described. In an example, an integrated circuit structure includes a semiconductor fin above a substrate, a gate electrode over the top and adjacent to the sidewalls of a portion of the semiconductor fin. A titanium silicide material is in direct contact with each of first and second epitaxial semiconductor source or drain structures at first and second sides of the gate electrode. The titanium silicide material is conformal with and hermetically sealing a non-flat topography of each of the first and second epitaxial semiconductor source or drain structures. The titanium silicide material has a total atomic composition including 95% or greater stoichiometric TiSi2.

Abstract: Integrated circuit structures having source or drain structures with a high germanium concentration capping layer are described. In an example, an integrated circuit structure includes source or drain structures including an epitaxial structure embedded in a fin at a side of a gate stack. The epitaxial structure has a lower semiconductor layer and a capping semiconductor layer on the lower semiconductor layer with an abrupt interface between the capping semiconductor layer and the lower semiconductor layer. The lower semiconductor layer includes silicon, germanium and boron, the germanium having an atomic concentration of less than 40% at the abrupt interface. The capping semiconductor layer includes silicon, germanium and boron, the germanium having an atomic concentration of greater than 50% at the abrupt interface and throughout the capping semiconductor layer.

Abstract: Integrated circuit structures having source or drain structures with low resistivity are described. In an example, integrated circuit structure includes a fin having a lower fin portion and an upper fin portion. A gate stack is over the upper fin portion of the fin, the gate stack having a first side opposite a second side. A first source or drain structure includes an epitaxial structure embedded in the fin at the first side of the gate stack. A second source or drain structure includes an epitaxial structure embedded in the fin at the second side of the gate stack. Each epitaxial structure of the first and second source or drain structures include silicon, germanium and boron. The first and second source or drain structures have a resistivity less than or equal to 0.3 mOhm·cm.

Abstract: Integrated circuit structures having source or drain structures with abrupt dopant profiles are described. In an example, an integrated circuit structure includes a vertical arrangement of horizontal nanowires. A gate stack is around the vertical arrangement of horizontal nanowires. A first epitaxial source or drain structure is at a first end of the vertical arrangement of horizontal nanowires. A second epitaxial source or drain structure is at a second end of the vertical arrangement of horizontal nanowires. The first and second epitaxial source or drain structures include silicon, phosphorous and arsenic, with an atomic concentration of phosphorous substantially the same as an atomic concentration of arsenic.

Abstract: Integrated circuit structures having source or drain structures with abrupt dopant profiles are described. In an example, an integrated circuit structure includes a vertical arrangement of horizontal nanowires. A gate stack is around the vertical arrangement of horizontal nanowires. A first epitaxial source or drain structure is at a first end of the vertical arrangement of horizontal nanowires. A second epitaxial source or drain structure is at a second end of the vertical arrangement of horizontal nanowires. The first and second epitaxial source or drain structures include silicon, phosphorous and arsenic, with an atomic concentration of phosphorous substantially the same as an atomic concentration of arsenic.

Abstract: Integrated circuit structures having source or drain structures with low resistivity are described. In an example, integrated circuit structure includes a fin having a lower fin portion and an upper fin portion. A gate stack is over the upper fin portion of the fin, the gate stack having a first side opposite a second side. A first source or drain structure includes an epitaxial structure embedded in the fin at the first side of the gate stack. A second source or drain structure includes an epitaxial structure embedded in the fin at the second side of the gate stack. Each epitaxial structure of the first and second source or drain structures include silicon, germanium and boron. The first and second source or drain structures have a resistivity less than or equal to 0.3 mOhm·cm.

Abstract: In one embodiment, a transistor includes a substrate, a buffer layer on the substrate a channel layer on the buffer layer, and one or more polarization layers on the channel layer. The one or more polarization layers include a group III-N material comprising a first group III constituent and a second group III constituent. The transistor further includes a plurality of p-type doped layers on the one or more polarization layers. Each of the plurality of p-type doped layers includes a first p-type dopant and the III-N material, wherein each successive layer of the first p-type doped layers has a lower proportion of the first group III constituent to the second group III constituent relative to a layer below it. The transistor also includes a p-type doped layer on the plurality of p-type doped layers comprising a second p-type dopant and a group III-N material.

Abstract: In one embodiment, a transistor is formed by a process comprising forming a buffer layer on a substrate, the buffer layer comprising a first group III-nitride (III-N) material (e.g., AlGaN), forming a channel layer on the buffer layer, the channel layer comprising a second III-N material (e.g., GaN), forming a polarization layer on the channel layer, the polarization layer comprising a third III-N material (e.g., AlGaN), flowing a p-type dopant precursor compound (e.g., Cp2Mg) after forming the polarization layer, forming a p-type doped layer (e.g., p-GaN) on the polarization layer, the p-type doped layer comprising a p-type dopant (e.g., Mg) and a fourth III-N material (e.g., GaN), forming a source region adjacent one end of the channel layer, and forming a drain region adjacent another end of the channel layer.

Abstract: Integrated circuit structures having source or drain structures with low resistivity are described. In an example, integrated circuit structure includes a fin having a lower fin portion and an upper fin portion. A gate stack is over the upper fin portion of the fin, the gate stack having a first side opposite a second side. A first source or drain structure includes an epitaxial structure embedded in the fin at the first side of the gate stack. A second source or drain structure includes an epitaxial structure embedded in the fin at the second side of the gate stack. Each epitaxial structure of the first and second source or drain structures include silicon, germanium and boron. The first and second source or drain structures have a resistivity less than or equal to 0.3 mOhm·cm.

Abstract: Integrated circuit structures having source or drain structures with phosphorous and arsenic co-dopants are described. In an example, an integrated circuit structure includes a fin having a lower fin portion and an upper fin portion. A gate stack is over the upper fin portion of the fin, the gate stack having a first side opposite a second side. A first source or drain structure includes an epitaxial structure embedded in the fin at the first side of the gate stack. A second source or drain structure includes an epitaxial structure embedded in the fin at the second side of the gate stack. The first and second source or drain structures include silicon, phosphorous and arsenic, with an atomic concentration of phosphorous substantially the same as an atomic concentration of arsenic.

Abstract: Substrate-less vertical diode integrated circuit structures, and methods of fabricating substrate-less vertical diode integrated circuit structures, are described. For example, a substrate-less integrated circuit structure includes a semiconductor fin in a dielectric layer, the semiconductor fin having a top and a bottom, and the dielectric layer having a top surface and a bottom surface. A first epitaxial semiconductor structure is on the top of the semiconductor fin. A second epitaxial semiconductor structure is on the bottom of the semiconductor fin. A first conductive contact is on the first epitaxial semiconductor structure. A second conductive contact is on the second epitaxial semiconductor structure.

Abstract: Integrated circuit structures having source or drain structures with a high germanium concentration capping layer are described. In an example, an integrated circuit structure includes source or drain structures including an epitaxial structure embedded in a fin at a side of a gate stack. The epitaxial structure has a lower semiconductor layer and a capping semiconductor layer on the lower semiconductor layer with an abrupt interface between the capping semiconductor layer and the lower semiconductor layer. The lower semiconductor layer includes silicon, germanium and boron, the germanium having an atomic concentration of less than 40% at the abrupt interface. The capping semiconductor layer includes silicon, germanium and boron, the germanium having an atomic concentration of greater than 50% at the abrupt interface and throughout the capping semiconductor layer.

Abstract: Approaches for fabricating an integrated circuit structure including a titanium silicide material, and the resulting structures, are described. In an example, an integrated circuit structure includes a semiconductor fin above a substrate, a gate electrode over the top and adjacent to the sidewalls of a portion of the semiconductor fin. A titanium silicide material is in direct contact with each of first and second epitaxial semiconductor source or drain structures at first and second sides of the gate electrode. The titanium silicide material is conformal with and hermetically sealing a non-flat topography of each of the first and second epitaxial semiconductor source or drain structures. The titanium silicide material has a total atomic composition including 95% or greater stoichiometric TiSi2.

Abstract: Integrated circuit structures having high surface germanium concentrations are described. In an example, an integrated circuit structure includes a fin having a lower fin portion and an upper fin portion. A gate stack is over the upper fin portion of the fin, the gate stack having a first side opposite a second side. A first source or drain structure has an epitaxial structure embedded in the fin at the first side of the gate stack. A second source or drain structure has an epitaxial structure embedded in the fin at the second side of the gate stack. Each of the epitaxial structures of the first and second source or drain structures includes silicon, germanium and boron, the germanium having an atomic concentration of greater than 55% at a top surface of each of the epitaxial structures of the first and second source or drain structures.

Abstract: Embodiments disclosed herein comprise a high electron mobility transistor (HEMT). In an embodiment, the HEMT comprises a heterojunction channel that includes a first semiconductor layer and a second semiconductor layer over the first semiconductor layer. In an embodiment a first interface layer is between the first semiconductor layer and the second semiconductor layer, and a second interface layer is over the first interface layer. In an embodiment, the HEMT further comprises a source contact, a drain contact, and a gate contact between the source contact and the drain contact.

Abstract: Integrated circuit structures having source or drain structures with abrupt dopant profiles are described. In an example, an integrated circuit structure includes a vertical arrangement of horizontal nanowires. A gate stack is around the vertical arrangement of horizontal nanowires. A first epitaxial source or drain structure is at a first end of the vertical arrangement of horizontal nanowires. A second epitaxial source or drain structure is at a second end of the vertical arrangement of horizontal nanowires. The first and second epitaxial source or drain structures include silicon, phosphorous and arsenic, with an atomic concentration of phosphorous substantially the same as an atomic concentration of arsenic.

Abstract: Integrated circuit structures having source or drain structures with low resistivity are described. In an example, integrated circuit structure includes a fin having a lower fin portion and an upper fin portion. A gate stack is over the upper fin portion of the fin, the gate stack having a first side opposite a second side. A first source or drain structure includes an epitaxial structure embedded in the fin at the first side of the gate stack. A second source or drain structure includes an epitaxial structure embedded in the fin at the second side of the gate stack. Each epitaxial structure of the first and second source or drain structures include silicon, germanium and boron. The first and second source or drain structures have a resistivity less than or equal to 0.3 mOhm·cm.