摘要:
Embodiments disclosed herein relate to an improved transistor with reduced parasitic capacitance. In one embodiment, the transistor device includes a three-dimensional fin structure protruding from a surface of a substrate, the three-dimensional fin structure comprising a top surface and two opposing sidewalls, a first insulating layer formed on the two opposing sidewalls of the three-dimension fin structure, a sacrificial spacer layer conformally formed on the first insulating layer, wherein the sacrificial spacer layer comprises an aluminum oxide based material or a titanium nitride based material, and a second insulating layer conformally formed on the sacrificial spacer layer.
摘要:
Methods and apparatus to form silicon-based transistors on group III-nitride materials using aspect ratio trapping are disclosed. An example integrated circuit includes a group III-nitride substrate and a fin of silicon formed on the group III-nitride substrate. The integrated circuit further includes a first transistor formed on the fin of silicon and a second transistor formed on the group III-nitride substrate.
摘要:
Provided is a method of patterning structures on a substrate using an integration scheme in a patterning system, the method comprising: disposing a substrate in a processing chamber, the substrate having a plurality of structures and a pattern, the substrate including an underlying layer and a target layer, at least one structure intersecting with another structure, each intersection having an intersection angle and a corner, the integration scheme requiring a vertical corner profile at each intersection; altematingly and sequentially etching and cleaning the substrate to transfer the pattern onto the target layer and to achieve a target vertical corner profile at each intersection; controlling selected two or more operating variables of the integration scheme in the alternating and sequential etching and cleaning operations in order to achieve target integration objectives.
摘要:
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.
摘要:
Disclosed herein are quantum dot devices with patterned gates, as well as related computing devices and methods. For example, a quantum dot device may include gates disposed on a quantum well stack. In some embodiments, the gates may include a first gate with a first length; two second gates with second lengths arranged such that the first gate is disposed between the second gates; and two third gates with third lengths arranged such that the second gates are disposed between the third gates; and the first, second, and third lengths may all be different. In some embodiments, the gates may include a first set of gates alternatingly arranged with a second set of gates, spacers may be disposed between gates of the first set and gates of the second set, and gates in the first or second set may include a gate dielectric having a U-shaped cross-section.
摘要:
The present invention relates to a method for selective etching of a nanostructure (10). The method comprising: providing the nanostructure (10) having a main surface (12) delimited by, in relation to the main surface (12), inclined surfaces (14); and subjecting the nanostructure (10) for a dry etching, wherein the dry etching comprises: subjecting the nanostructure (10) for a low energy particle beam (20) having a direction perpendicular to the main surface (12); whereby a recess (16) in the nanostructure (10) is formed, the recess (16) having its opening at the main surface (12) of the nanostructure (10).
摘要:
Nanowire channel structures of continuously stacked nanowires for complementary metal oxide semiconductor (CMOS) devices are disclosed.In one aspect, an exemplary CMOS device includes a nanowire channel structure that includes a plurality of continuously stacked nanowires.Vertically adjacent nanowires are connected at narrow top and bottom end portions of each nanowire.Thus, the nanowire channel structure comprises a plurality of narrow portions that are narrower than a corresponding plurality of central portions.A wrap-around gate material is disposed around the nanowire channel structure, including the plurality of narrow portions, without entirely wrapping around any nanowire therein.The exemplary CMOS device provides, for example, a larger effective channel width and better gate control than a conventional fin field-effect transistor (FET) (FinFET) of a similar footprint.The exemplary CMOS device further provides, for example, a shorter nanowire channel structure than a conventional nanowire FET.
摘要:
Embodiments of the invention include a non-planar transistor with a strained channel and methods of forming such a transistor. In an embodiment, the non-planar transistor may include a semiconductor substrate. According to an embodiment, a first source/drain (S/D) region and a second S/D region may be formed over the semiconductor substrate and separated from each other by a channel region. A gate stack may be formed over the channel region. In order to increase the amount of strain that may be induced in the channel region, embodiments may include forming a strain enhancement opening in the semiconductor substrate that removes at least a portion of the semiconductor substrate from below the channel region.
摘要:
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.
摘要:
Techniques herein provide precise cuts for fins and nanowires without needing dummy gate pairs to compensate for overlay misalignment. Techniques herein include using an etch mask to remove designated portions of gate structures to define a trench or open space having fin structures, nanowires, etc. The uncovered fin structures are etched away or otherwise removed from the trench segments. The etch mask and material defining the trench provide a combined etch mask for removing uncovered fin portions. Subsequently the trench segments are filled with dielectric material. Without needed dummy gate pairs a given substrate can fit significantly more electrical devices per unit area.