A device includes a first source/drain region including: a first metal layer including a first metal; and a conductive two-dimensional material on the first metal layer; an isolation layer physically contacting a sidewall of the first metal layer, wherein the conductive two-dimensional material protrudes above the isolation layer; a two-dimensional semiconductor material on the isolation layer, wherein a sidewall of the two-dimensional semiconductor material physically contacts a sidewall of the conductive two-dimensional material; and a gate stack on the two-dimensional semiconductor material.

Provided are a vertical-channel cell array transistor structure and a dynamic random-access memory (DRAM) device including the same. The vertical-channel cell array transistor structure includes a semiconductor substrate, a plurality of channels arranged in an array on the semiconductor substrate and each extending perpendicularly from the semiconductor substrate, a gate insulating layer on the plurality of channels, a plurality of word lines on the semiconductor substrate and extending in a first direction, and a two-dimensional (2D) material layer on at least one surface of each of the plurality of word lines.

An integrated circuit includes a two-dimensional transistor having a channel region having lateral ends in contact with first and second source/drain regions. The transistor includes a gate dielectric that is aligned with the lateral ends of the channel region. The transistor includes a gate metal on the gate dielectric. The gate metal has a relatively small lateral overlap of the first and second source/drain regions.

A planar transistor device is disclosed including a gate structure positioned above a semiconductor substrate, the semiconductor substrate comprising a substantially planar upper surface, a channel region, a source region, a drain region, and at least one layer of a two-dimensional (2D) material that is positioned in at least one of the source region, the drain region or the channel region, wherein the layer of 2D material has a substantially planar upper surface, a substantially planar bottom surface and a substantially uniform vertical thickness across an entire length of the layer of 2D material in the gate length direction and across an entire width of the layer of 2D material in the gate width direction, wherein the substantially planar upper surface and the substantially planar bottom surface of the layer of 2D material are positioned approximately parallel to a substantially planar surface of the semiconductor substrate.

Disclosed are a field effect transistor and a method of manufacturing the same. The field effect transistor includes a source electrode on a substrate, a drain electrode separated from the source electrode, and channels connected between the source electrode and the drain electrode, gate insulating layers, and a gate electrode. The channels may have a hollow closed cross-sectional structure when viewed in a first cross-section formed by a plane across the source electrode and the drain electrode in a direction perpendicular to the substrate. The gate insulating layers may be in the channels. The gate electrode may be insulated from the source electrode and the drain electrode by the gate insulating layers.

High voltage metal insulator metal capacitors are described. In an example, a capacitor includes a first electrode plate, and a first capacitor dielectric on the first electrode plate. A second electrode plate is on the first capacitor dielectric and is over and parallel with the first electrode plate, and a second capacitor dielectric is on the second electrode plate. A third electrode plate is on the second capacitor dielectric and is over and parallel with the second electrode plate, and a third capacitor dielectric is on the third electrode plate. A fourth electrode plate is on the third capacitor dielectric and is over and parallel with the third electrode plate. In another example, a capacitor includes a first electrode, a capacitor dielectric on the first electrode, and a second electrode on the capacitor dielectric. The capacitor dielectric includes a plurality of alternating first dielectric layers and second dielectric layers.

High voltage metal insulator metal capacitors are described. In an example, a capacitor includes a first electrode plate, and a first capacitor dielectric on the first electrode plate. A second electrode plate is on the first capacitor dielectric and is over and parallel with the first electrode plate, and a second capacitor dielectric is on the second electrode plate. A third electrode plate is on the second capacitor dielectric and is over and parallel with the second electrode plate, and a third capacitor dielectric is on the third electrode plate. A fourth electrode plate is on the third capacitor dielectric and is over and parallel with the third electrode plate. In another example, a capacitor includes a first electrode, a capacitor dielectric on the first electrode, and a second electrode on the capacitor dielectric. The capacitor dielectric includes a plurality of alternating first dielectric layers and second dielectric layers.

A process is provided to fabricate a finFET device having a semiconductor layer of a two-dimensional 2D semiconductor material. The semiconductor layer of the 2D semiconductor material is a thin film layer formed over a dielectric fin-shaped structure. The 2D semiconductor layer extends over at least three surfaces of the dielectric fin structure, e.g., the upper surface and two sidewall surfaces. A vertical protrusion metal structure, referred to as metal fin structure, is formed about an edge of the dielectric fin structure and is used as a seed to grow the 2D semiconductor material.

An integrated circuit device comprises a metal-oxide-semiconductor (MOS) transistor comprising a gate stack formed over a channel region thereof and a bipolar junction transistor (BJT) comprising a layer stack formed over a collector region thereof. Some features of the MOS transistor and the BJT are co-fabricated such that they have common physical characteristics.

An integrated circuit device comprises a metal-oxide-semiconductor (MOS) transistor comprising a gate stack formed over a channel region thereof and a bipolar junction transistor (BJT) comprising a layer stack formed over a collector region thereof. Some features of the MOS transistor and the BJT are co-fabricated such that they have common physical characteristics.