Abstract:
Transistors including doped heteroepitaxial III-N source/drain crystals. In embodiments, transistors including a group IV or group III-V channel crystal employ n+ doped III-N source/drain structures on either side of a gate stack. Lateral tensile strain of the channel crystal may result from lattice mismatch between the channel crystal and the III-N source/drain crystals. In embodiments, an amorphous material is employed to limit growth of III-N material to only a single channel crystal facet, allowing a high quality monocrystalline source/drain to form that is capable of sustaining significant stress. In some embodiments, an n+ III-N source/drain crystal is grown on a (110) or (111) surface of a silicon channel crystal fabricated into a fin structure to form a tensile strained NMOS finFET.
Abstract:
Embodiments of the present disclosure are directed toward an integrated circuit (IC) die. In embodiments, an IC die may include a semiconductor substrate and a buffer layer disposed over the semiconductor substrate. The buffer layer may have a plurality of openings formed therein. In embodiments, the IC die may further include a plurality of group III-Nitride structures. Individual group III-Nitride structures of the plurality of group III-Nitride structures may include a lower portion disposed in a respective opening of the plurality of openings and an upper portion disposed over the respective opening. In embodiments, the upper portion may include a base extending radially from sidewalls of the respective opening over a surface of the buffer layer to form a perimeter around the respective opening. Other embodiments may be described and/or claimed.
Abstract:
Embodiments of the present disclosure are directed towards an integrated circuit (IC) die. In embodiments, an IC die may include a semiconductor substrate, a group III-Nitride or II-VI wurtzite layer disposed over the semiconductor substrate, and a plurality of buffer structures at least partially embedded in the group III-Nitride or II-VI wurtzite layer. In some embodiments, each of the plurality of buffer structures may include a central member disposed over the semiconductor substrate, a lower lateral member disposed over the semiconductor substrate and extending laterally away from the central member, and an upper lateral member disposed over the central member and extending laterally from the central member in an opposite direction from the lower lateral member. The plurality of buffer structures may be positioned in a staggered arrangement to terminate defects of the group III-Nitride or II-VI wurtzite layer. Other embodiments may be described and/or claimed.
Abstract:
A III-N semiconductor channel is formed on a III-N transition layer formed on a (111) or (110) surface of a silicon template structure, such as a fin sidewall. In embodiments, the silicon fin has a width comparable to the III-N epitaxial film thicknesses for a more compliant seeding layer, permitting lower defect density and/or reduced epitaxial film thickness. In embodiments, a transition layer is GaN and the semiconductor channel comprises Indium (In) to increase a conduction band offset from the silicon fin. In other embodiments, the fin is sacrificial and either removed or oxidized, or otherwise converted into a dielectric structure during transistor fabrication. In certain embodiments employing a sacrificial fin, the III-N transition layer and semiconductor channel is substantially pure GaN, permitting a breakdown voltage higher than would be sustainable in the presence of the silicon fin.
Abstract:
Techniques are disclosed for forming a defect-free semiconductor structure on a dissimilar substrate with a multi-aspect ratio mask. The multi-aspect ratio mask comprises a first, second, and third layer formed on a substrate. The second layer has a second opening wider than a first opening and a third opening in the first and third layers, respectively. All three openings are centered along a common central axis. A semiconductor material is grown from the top surface of the substrate and laterally onto the top surface of the first layer within the second opening. The semiconductor material disposed within and vertically below the third opening is etched by using the third layer as an etch mask so that the remaining material that laterally overflowed onto the top surface of the first layer forms a remaining structure.
Abstract:
Vertical semiconductor devices having selectively regrown top contacts and method of fabricating vertical semiconductor devices having selectively regrown top contacts are described. For example, a semiconductor device includes a substrate having a surface. A first source/drain region is disposed on the surface of the substrate. A vertical channel region is disposed on the first source/drain region and has a first width parallel with the surface of the substrate. A second source/drain region is disposed on the vertical channel region and has a second width parallel with and substantially greater than the first width. A gate stack is disposed on and completely surrounds a portion of the vertical channel region.
Abstract:
Embodiments of semiconductor assemblies, and related integrated circuit devices and techniques, are disclosed herein. In some embodiments, a semiconductor assembly may include a flexible substrate, a polycrystalline semiconductor material, and a polycrystalline dielectric disposed between and adjacent to the flexible substrate and the polycrystalline semiconductor material. The polycrystalline semiconductor material. The polycrystalline semiconductor material may include a polycrystalline III-V material, a polycrystalline II-VI material or polycrystalline germanium. Other embodiments may be disclosed and/or claimed.
Abstract:
Embodiments disclosed herein include a coupled inductor. In an embodiment, the coupled inductor comprises a first inductor and a second inductor. In an embodiment, the first inductor can be coupled to the first inductor. In an embodiment, the coupled inductor further comprises a first switch coupled to the first inductor, where the first switch comprises gallium and nitrogen, and a second switch coupled to the second inductor, where the second switch comprises gallium and nitrogen.
Abstract:
Gallium nitride (GaN) layer transfer for integrated circuit technology is described. In an example, an integrated circuit structure includes a substrate including silicon. A first layer including gallium and nitrogen is over a first region of the substrate, the first layer having a gallium-polar orientation with a top crystal plane consisting of a gallium face. A second layer including gallium and nitrogen is over a second region of the substrate, the second layer having a nitrogen-polar orientation with a top crystal plane consisting of a nitrogen face.
Abstract:
Gallium nitride (GaN) integrated circuit technology with multi-layer epitaxy and layer transfer is described. In an example, an integrated circuit structure includes a first channel structure including a plurality of alternating first channel layers and second channel layers, the first channel layers including gallium and nitrogen, and the second layers including gallium, aluminum and nitrogen. A second channel structure is bonded to the first channel structure. The second channel structure includes a plurality of alternating third channel layers and fourth channel layers, the third channel layers including gallium and nitrogen, and the fourth layers including gallium, aluminum and nitrogen.