Patent ID: 11869983
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. A Junction Field Effect Transistor (JFET) comprising:
a substrate;
a source disposed on the substrate, the source having an S/D doping, the S/D doping having an S/D doping type;
a drain disposed on the substrate, the drain having the S/D doping type;
two or more channels electrically connected in parallel between the source and drain and capable of carrying a current between the source and drain, each of the channels having two or more channel surfaces, the channel having a channel doping with a channel doping type, the channel doping type being the same as the S/D doping type;
a gate in direct contact with two or more of the channel surfaces of each of two or more of the channels, the gate having gate doping with a gate doping type, the gate doping type being an opposite doping to the channel doping type, and the gate forming a junction gate at each channel surface where the gate is in direct contact,
gate spacers spaced lateral from the gate;
wherein:
a voltage applied to the gate creates at least two depletion regions in all of the channels, a first depletion region created at a first channel surface where the gate is in direct contact and a second depletion region created at a second channel surface where the gate is in direct contact;
the channels are made of nanosheet layers and a channel layer thickness is between 5 nanometers (nm) and 30 nm;
the gate is an all-around gate of a single unified structure; and
an outermost point of the gate does not extend as far outward as an outermost point of the source, an outermost point of the drain, and an outermost point of the gate spacers.