A field effect transistor includes a source region and a drain region formed within and/or above openings in a dielectric capping mask layer overlying a semiconductor substrate and a gate electrode. A source-side silicide portion and a drain-side silicide portion are self-aligned to the source region and to the drain region, respectively.

The present application discloses a semiconductor device and a method for fabricating the semiconductor device. The semiconductor device includes a substrate including a first region, and a first transistor positioned in the first region. The first transistor includes a first bottom gate structure positioned on the substrate, a first channel layer positioned on the first bottom gate structure, a first top gate structure positioned on the first channel layer, and two first source/drain regions positioned on two sides of the first channel layer.

The present application discloses a method for fabricating a semiconductor device with a tapering impurity region. The method includes providing a substrate; forming a word line structure in the substrate; performing an isotropic etch process to form a first recess in the substrate, wherein the first recess comprises tapering sidewalls; performing an anisotropic etch process to expand the first recess and form a second recess below the first recess; and forming an impurity region in the first recess and in the second recess and adjacent to the word line structure.

A method for fabricating semiconductor device includes the steps of: forming a fin-shaped structure on a substrate; forming a gate dielectric layer on the fin-shaped structure; forming a gate electrode on the fin-shaped structure; performing a nitridation process to implant ions into the gate dielectric layer adjacent to two sides of the gate electrode; and forming an epitaxial layer adjacent to two sides of the gate electrode.

A method includes forming a metal-oxide-semiconductor field-effect transistor (MOSFET). The Method includes performing an implantation to form a pre-amorphization implantation (PAI) region adjacent to a gate electrode of the MOSFET, forming a strained capping layer over the PAI region, and performing an annealing on the strained capping layer and the PAI region to form a dislocation plane. The dislocation plane is formed as a result of the annealing, with a tilt angle of the dislocation plane being smaller than about 65 degrees.

The present disclosure, in some embodiments, relates to an integrated chip. The integrated chip includes an isolation structure arranged within a substrate. The isolation structure has one or more surfaces defining one or more trenches that are recessed below an uppermost surface of the isolation structure and that are disposed along opposing sides of an active region of the substrate. A conductive gate is arranged over the substrate between a source region and a drain region. The conductive gate extends into the one or more trenches disposed along opposing sides of the active region of the substrate. The conductive gate has an upper surface that continuously extends past opposing sides of the one or more trenches.

A method for manufacturing a semiconductor device includes forming a source and region in a substrate. A core channel region is formed adjacent the source region. A barrier layer is formed adjacent the core channel region. A drain region is formed in the substrate such that the barrier layer is between the core channel region and the drain region. A first portion of a shell is formed along the core channel region. A second portion of the shell is formed along the barrier layer. The second portion of the shell includes a different material than the first portion of the shell.

A semiconductor structure and method of manufacture and, more particularly, a field effect transistor that has a body contact and method of manufacturing the same is provided. The structure includes a device having a raised source region of a first conductivity type and an active region below the raised source region extending to a body of the device. The active region has a second conductivity type different than the first conductivity type. A contact region is in electric contact with the active region. The method includes forming a raised source region over an active region of a device and forming a contact region of a same conductivity type as the active region, wherein the active region forms a contact body between the contact region and a body of the device.

In an embodiment, a device includes: a first nanostructure over a substrate, the first nanostructure including a channel region and a first lightly doped source/drain region, the first lightly doped source/drain region adjacent the channel region; a first epitaxial source/drain region wrapped around four sides of the first lightly doped source/drain region; an interlayer dielectric over the first epitaxial source/drain region; a source/drain contact extending through the interlayer dielectric, the source/drain contact wrapped around four sides of the first epitaxial source/drain region; and a gate stack adjacent the source/drain contact and the first epitaxial source/drain region, the gate stack wrapped around four sides of the channel region.

A semiconductor device includes a semiconductor substrate, a gate structure, a first drift region, a first source/drain region, and a gate oxide layer. The gate structure and the gate oxide layer are disposed on the semiconductor substrate. The first drift region is disposed in the semiconductor substrate. The first source/drain region is disposed in the first drift region. At least a part of a first portion of the gate oxide layer is disposed between the gate structure and the semiconductor substrate in a vertical direction. A second portion of the gate oxide layer is disposed between the first portion and the first source/drain region in a horizontal direction. The second portion includes a bottom extending downwards and a first concave top surface located above the bottom. A part of the first drift region is located under the first portion and the second portion of the gate oxide layer.