Abstract:
Embodiments of the invention include nanowire and nanoribbon transistors and methods of forming such transistors. According to an embodiment, a method for forming a microelectronic device may include forming a multi-layer stack within a trench formed in a shallow trench isolation (STI) layer. The multi-layer stack may comprise at least a channel layer, a release layer formed below the channel layer, and a buffer layer formed below the channel layer. The STI layer may be recessed so that a top surface of the STI layer is below a top surface of the release layer. The exposed release layer from below the channel layer by selectively etching away the release layer relative to the channel layer.
Abstract:
Techniques are disclosed for wafer bonding with an encapsulation layer. A first semiconductor substrate is provided. An encapsulation layer is then formed on top of the first semiconductor substrate. The encapsulation layer is formed of an encapsulation material that creates a stable oxide when exposed to an oxidizing agent. A first bonding layer is formed on top of the encapsulation layer. Next, a second semiconductor substrate is provided. A second bonding layer is formed on top of the second bonding layer. Thereafter, the first semiconductor substrate is bonded to the second semiconductor substrate by attaching the first bonding layer to the second bonding layer.
Abstract:
A nanowire device having a plurality of internal spacers and a method for forming said internal spacers are disclosed. In an embodiment, a semiconductor device comprises a nanowire stack disposed above a substrate, the nanowire stack having a plurality of vertically-stacked nanowires, a gate structure wrapped around each of the plurality of nanowires, defining a channel region of the device, the gate structure having gate sidewalls, a pair of source/drain regions on opposite sides of the channel region; and an internal spacer on a portion of the gate sidewall between two adjacent nanowires, internal to the nanowire stack. In an embodiment, the internal spacers are formed by depositing spacer material in dimples etched adjacent to the channel region. In an embodiment, the dimples are etched through the channel region. In another embodiment, the dimples are etched through the source/drain region.
Abstract:
Aspect ratio trapping (ART) approaches for fabricating vertical semiconductor devices and vertical semiconductor devices fabricated there from are described. For example, a semiconductor device includes a substrate with an uppermost surface having a first lattice constant. A first source/drain region is disposed on the uppermost surface of the substrate and has a second, different, lattice constant. A vertical channel region is disposed on the first source/drain region. A second source/drain region is disposed on the vertical channel region. A gate stack is disposed on and completely surrounds a portion of the vertical channel region.
Abstract:
A single fin or a pair of co-integrated n- and p-type single crystal electronic device fins are epitaxially grown from a substrate surface at a bottom of one or a pair of trenches formed between shallow trench isolation (STI) regions. The fin or fins are patterned and the STI regions are etched to form a height of the fin or fins extending above etched top surfaces of the STI regions. The fin heights may be at least 1.5 times their width. The exposed sidewall surfaces and a top surface of each fin is epitaxially clad with one or more conformal epitaxial materials to form device layers on the fin. Prior to growing the fins, a blanket buffer epitaxial material may be grown from the substrate surface; and the fins grown in STI trenches formed above the blanket layer. Such formation of fins reduces defects from material interface lattice mismatches.
Abstract:
Methods of forming microelectronic structures are described. Embodiments of those methods include forming a nanowire device comprising a substrate comprising source/drain structures adjacent to spacers, and nanowire channel structures disposed between the spacers, wherein the nanowire channel structures are vertically stacked above each other.
Abstract:
A transistor includes a body of semiconductor material, where the body has laterally opposed body sidewalls and a top surface. A gate structure contacts the top surface of the body. A source region contacts a first one of the laterally opposed body sidewalls and a drain region contacts a second one of the laterally opposed body sidewalls. A first isolation region is under the source region and has a top surface in contact with a bottom surface of the source region. A second isolation region is under the drain region and has a top surface in contact with a bottom surface of the drain region. Depending on the transistor configuration, a major portion of the inner-facing sidewalls of the first and second isolation regions contact respective sidewalls of either a subfin structure (e.g., FinFET transistor configurations) or a lower portion of a gate structure (e.g., gate-all-around transistor configuration).
Abstract:
A device is disclosed. The device includes a first epitaxial region, a second epitaxial region, a first gate region between the first epitaxial region and a second epitaxial region, a first dielectric structure underneath the first epitaxial region, a second dielectric structure underneath the second epitaxial region, a third epitaxial region underneath the first epitaxial region, a fourth epitaxial region underneath the second epitaxial region, and a second gate region between the third epitaxial region and a fourth epitaxial region and below the first gate region. The device also includes, a conductor via extending from the first epitaxial region, through the first dielectric structure and the third epitaxial region, the conductor via narrower at an end of the conductor via that contacts the first epitaxial region than at an opposite end.
Abstract:
Gate-all-around integrated circuit structures having an insulator fin on an insulator substrate, and methods of fabricating gate-all-around integrated circuit structures having an insulator fin on an insulator substrate, are described. For example, an integrated circuit structure includes an insulator fin on an insulator substrate. A vertical arrangement of horizontal semiconductor nanowires is over the insulator fin. A gate stack surrounds a channel region of the vertical arrangement of horizontal semiconductor nanowires, and the gate stack is overlying the insulator fin. A pair of epitaxial source or drain structures is at first and second ends of the vertical arrangement of horizontal semiconductor nanowires and at first and second ends of the insulator fin.
Abstract:
Neighboring gate-all-around integrated circuit structures having a conductive contact stressor between epitaxial source or drain regions are described. In an example, a first vertical arrangement of nanowires and a second vertical arrangement of nanowires above a substrate. A first gate stack is over the first vertical arrangement of nanowires. A second gate stack is over the second vertical arrangement of nanowires. First epitaxial source or drain structures are at ends of the first vertical arrangement of nanowires. Second epitaxial source or drain structures are at ends of the second vertical arrangement of nanowires. An intervening conductive contact structure is between neighboring ones of the first epitaxial source or drain structures and of the second epitaxial source or drain structures. The intervening conductive contact structure imparts a stress to the neighboring ones of the first epitaxial source or drain structures and of the second epitaxial source or drain structures.