Abstract:
A subfin layer is deposited in a trench in an insulating layer on the substrate. A fin is deposited on the subfin layer. The fin has a top portion and opposing sidewalls. The fin comprises a first semiconductor material. The subfin layer comprises a III-V semiconductor material.
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:
An apparatus including a semiconductor body including a channel region and junction regions disposed on opposite sides of the channel region, the semiconductor body including a first material including a first band gap; and a plurality of nanowires including a second material including a second band gap different than the first band gap, the plurality of nanowires disposed in separate planes extending through the first material so that the first material surrounds each of the plurality of nanowires; and a gate stack disposed on the channel region. A method including forming a plurality of nanowires in separate planes above a substrate, each of the plurality of nanowires including a material including a first band gap; individually forming a cladding material around each of the plurality of nanowires, the cladding material including a second band gap; coalescing the cladding material; and disposing a gate stack on the cladding material.