Integrated circuit devices and methods of forming the same are provided. The methods may include sequentially forming an underlying mask layer and a preliminary first mask layer on a substrate, forming a first mask structure by removing a portion of the preliminary first mask layer, and then forming a preliminary second mask layer. The preliminary second mask layer may enclose the first mask structure in a plan view. The methods may also include forming a second mask structure by removing a portion of the preliminary second mask layer and forming a vertical channel region including a portion of the substrate by sequentially etching the underlying mask layer and the substrate. The second mask structure may be connected to the first mask structure, and etching the underlying mask layer may be performed using the first and the second mask structures as an etch mask.

The application relates to a semiconductor switch element, including: a first vertical transistor device formed in a substrate and having a source region formed on a first side of the substrate and a drain region formed on a second side of the substrate vertically opposite to the first side; a second vertical transistor device formed laterally aside the first vertical transistor device in the same substrate and having a source region formed on the first side of the substrate and a drain region formed on the second side of the substrate; a conductive element arranged on the second side of the substrate and electrically connecting the drain regions of the vertical transistor devices; and a trench extending vertically into the substrate at the second side of the substrate, wherein at least a part of the conductive element is arranged in the trench.

Techniques herein include methods for fabricating complete field effect transistors having an upright or vertical orientation. The methods can utilize epitaxial growth to provide fine control over material deposition and thickness of said material layers. The methods can provide separate control of channel doping in either NMOS and/or PMOS transistors. All of a source, channel, and drain can be epitaxially grown in an opening into a dielectric layer stack, with said doping executed during said epitaxial growth.

A method used in forming an array of memory cells comprises forming lines of top-source/drain-region material, bottom-source/drain-region material, and channel-region material vertically there-between in rows in a first direction. The lines are spaced from one another in a second direction. The top-source/drain-region material, bottom-source/drain-region material, and channel-region material have respective opposing sides. The channel-region material on its opposing sides is laterally recessed in the second direction relative to the top-source/drain-region material and the bottom-source/drain-region material on their opposing sides to form a pair of lateral recesses in the opposing sides of the channel-region material in individual of the rows. After the pair of lateral recesses are formed, the lines of the top-source/drain-region material, the channel-region material, and the bottom-source/drain-region material are patterned in the second direction to comprise pillars of individual transistors. Rows of wordlines are formed in the first direction that individually are operatively aside the channel-region material of individual of the pillars in the pairs of lateral recesses and that interconnect the transistors in that individual row. Other embodiments, including structure independent of method, are disclosed.

The present disclosure provides a method of manufacturing a semiconductor structure and a semiconductor structure, and relates to the technical field of semiconductors. The method of manufacturing a semiconductor structure includes: providing a base; forming a functional stack on the base, wherein the functional stack includes a first doped layer, a second doped layer and a third doped layer that are stacked sequentially, the first doped layer is provided on the base, dopant ions in the second doped layer are different from dopant ions in the first doped layer, and the dopant ions in the first doped layer are the same as dopant ions in the third doped layer; and removing a part of the functional stack to form a plurality of active pillars arranged at intervals.

A tunneling field effect transistor device disclosed herein includes a substrate, a body comprised of a first semiconductor material being doped with a first type of dopant material positioned above the substrate, and a second semiconductor material positioned above at least a portion of the gate region and above the source region. The first semiconductor material is part of the drain region, and the second semiconductor material defines the channel region. The device also includes a third semiconductor material positioned above the second semiconductor material and above at least a portion of the gate region and above the source region. The third semiconductor material is part of the source region, and is doped with a second type of dopant material that is opposite to the first type of dopant material. A gate structure is positioned above the first, second and third semiconductor materials in the gate region.

Embodiments of the invention are directed to a semiconductor structure that includes a first fin structure having a first sidewall, a first gate structure adjacent a lower portion of the first sidewall, and a first spacer structure over the first gate structure and adjacent an upper portion of first the sidewall. The first spacer structure includes a first spacer structure thickness dimension that extends in a first direction away from the first sidewall. The first gate structure includes a first gate structure thickness dimension that extends in the first direction away from the first sidewall. The first gate structure dimension is about equal to the first spacer structure thickness dimension.

A method of forming a fin field effect transistor (finFET) having fin(s) with reduced dimensional variations, including forming a dummy fin trench within a perimeter of a fin pattern region on a substrate, forming a dummy fin fill in the dummy fin trench, forming a plurality of vertical fins within the perimeter of the fin pattern region, including border fins at the perimeter of the fin pattern region and interior fins located within the perimeter and inside the bounds of the border fins, wherein the border fins are formed from the dummy fin fill, and removing the border fins, wherein the border fins are dummy fins and the interior fins are active vertical fins.

In an embodiment, this invention relates to a vertical field-effect transistor component including a bottom source-drain layer and a method of creating the same. The method of forming a bottom source-drain layer of a vertical field-effect transistor component can comprise forming an anchor structure on a substrate. A sacrificial layer can be deposited on a middle region of the substrate and a channel layer can be deposited on the sacrificial layer. A plurality of vertical fins can be formed on the substrate and the sacrificial layer can be removed such that the plurality of vertical fins in the middle region form a plurality of floating fins having a gap located between the plurality of floating fins and the substrate. The bottom source-drain layer can then be formed such that the bottom source-drain layer fills in the gap.

A MOSFET having a stacked-gate super-junction design and novel termination structure. At least some illustrative embodiments of the device include a conductive (highly-doped with dopants of a first conductivity type) substrate with a lightly-doped epitaxial layer. The volume of the epitaxial layer is substantially filled with a charge compensation structure having vertical trenches forming intermediate mesas. The mesas are moderately doped via the trench sidewalls to have a second conductivity type, while the mesa tops are heavily-doped to have the first conductivity type. Sidewall layers are provided in the vertical trenches, the sidewall layers being a moderately-doped semiconductor of the first conductivity type. The shoulders of the sidewall layers are recessed below the mesa top to receive an overlying gate for controlling a channel between the mesa top and the sidewall layer. The mesa tops are coupled to a source electrode, while a drain electrode is provided on the back side of the substrate.