A method for forming a semiconductor arrangement comprises forming a fin over a semiconductor layer. A gate structure is formed over a first portion of the fin. A second portion of the fin adjacent to the first portion of the fin and a portion of the semiconductor layer below the second portion of the fin are removed to define a recess. A stress-inducing material is formed in the recess. A first semiconductor material is formed in the recess over the stress-inducing material. The first semiconductor material is different than the stress-inducing material.

A semiconductor device includes a gate structure disposed over a channel region, a source/drain epitaxial layer disposed at a source/drain region, a nitrogen containing layer disposed on the source/drain epitaxial layer, a silicide layer disposed on the nitrogen containing layer, and a conductive contact disposed on the silicide layer.

The present disclosure generally relates to a gate-all-around (GAA) transistor. The GAA transistor may include regrown source/drain layers in source/drain stressors. Atomic ratio differences among the regrown source/drain layers are tuned to reduce strain mismatch among the semiconductor nanosheets. Alternatively, the GAA transistor may include strained channels formed using a layer stack of alternating semiconductor layers having different lattice constants.

A field-effect-transistor includes forming a fin structure on a substrate, a gate structure formed across each fin structure and covering a portion of top and sidewall surfaces of the fin structure, a first doped layer, made of a first semiconductor material and doped with first doping ions, in each fin structure on one side of the corresponding gate structure, and a second doped layer, made of a second semiconductor material, doped with second doping ions, and having doping properties different from the first doped layer, in each fin structure on another side of the corresponding gate structure.

A method of manufacturing a semiconductor device includes forming an alloy semiconductor material layer comprising a first element and a second element on a semiconductor substrate. A mask is formed on the alloy semiconductor material layer to provide a masked portion and an unmasked portion of the alloy semiconductor material layer. The unmasked portion of the alloy semiconductor material layer not covered by the mask is irradiated with radiation from a radiation source to transform the alloy semiconductor material layer so that a surface region of the unmasked portion of the alloy semiconductor material layer has a higher concentration of the second element than an internal region of the unmasked portion of the alloy semiconductor material layer. The surface region surrounds the internal region.

A semiconductor device includes a first layer that includes a first semiconductor material disposed on a semiconductor substrate, and a second layer of a second semiconductor material disposed on the first layer. The semiconductor substrate includes Si. The first semiconductor material and the second semiconductor material are different. The second semiconductor material is formed of an alloy including a first element and Sn. A surface region of an end portion of the second layer at both ends of the second layer has a higher concentration of Sn than an internal region of the end portion of the second layer. The surface region surrounds the internal region.

Methods for depositing a silicon germanium tin boron (SiGeSn:B) film on a substrate are described. The method comprises exposing a substrate to a precursor mixture comprising a boron precursor, a silicon precursor, a germanium precursor, and a tin precursor to form a boron silicon germanium tin (SiGeSn:B) film on the substrate.

A device comprises a plurality of nanosheets, source/drain stressors, and a gate structure wrapping around the nanosheets. The nanosheets extend in a first direction above a semiconductor substrate and are arranged in a second direction substantially perpendicular to the first direction. The source/drain stressors are on either side of the nanosheets. Each of the source/drain stressors comprises a first epitaxial layer and a second epitaxial layer over the first epitaxial layer. The first and second epitaxial layers are made of a Group IV element and a Group V element. An atomic ratio of the Group V element to the Group IV element in the second epitaxial layer is greater than an atomic ratio of the Group V element to the Group IV element in the first epitaxial layer.

Methods and systems for selectively depositing a p-type doped silicon germanium layer and structures and devices including a p-type doped silicon germanium layer are disclosed. An exemplary method includes providing a substrate, comprising a surface comprising a first area comprising a first material and a second area comprising a second material, within a reaction chamber; depositing a p-type doped silicon germanium layer overlying the surface, the p-type doped silicon germanium layer comprising gallium; and depositing a cap layer overlying the p-type doped silicon germanium layer. The method can further include an etch step to remove the cap layer and the p-type doped silicon germanium layer overlying the second material.

A semiconductor device includes a first layer that includes a first semiconductor material disposed on a semiconductor substrate, and a second layer of a second semiconductor material disposed on the first layer. The semiconductor substrate includes Si. The first semiconductor material and the second semiconductor material are different. The second semiconductor material is formed of an alloy including a first element and Sn. A surface region of an end portion of the second layer at both ends of the second layer has a higher concentration of Sn than an internal region of the end portion of the second layer. The surface region surrounds the internal region.