Patent ID: 11881510
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 12:
13. A semiconductor device, comprising:
a substrate;
a plurality of channels comprising a first channel on the substrate and a second channel located on a higher vertical level than the first channel;
a first source or drain structure in contact with a first side surface of each of the plurality of channels;
a second source or drain structure in contact with a second side surface of each of the plurality of channels spaced apart from the first side surface of each of the plurality of channels in a first horizontal direction;
a gate structure including a gate electrode layer at least partially surrounding an upper surface of each of the plurality of channels, a lower surface of each of the plurality of channels, a third side surface of each of the plurality of channels, and a fourth side surface of each of the plurality of channels spaced apart from the third side surface of each of the plurality of channels in a second horizontal direction, and a gate insulating layer disposed between the gate electrode layer and each of the plurality of channels;
an inner spacer layer disposed on a side surface of the gate structure perpendicular to the first horizontal direction; and
an outer spacer layer disposed on an outer surface of the inner spacer layer,
wherein the first source or drain structure includes a first source or drain layer disposed on the first side surface of the plurality of channels and a second source or drain layer disposed on the first source or drain layer,
wherein a width of the first channel in the first horizontal direction is different from a width of the second channel in the first horizontal direction, and
wherein on a plane of the semiconductor device that passes through a portion of the gate electrode layer between the plurality of channels and is perpendicular to a vertical direction, at least one of a first boundary line of the first source or drain layer in contact with the second source or drain layer and a second boundary line of the first source or drain layer in contact with the gate insulating layer is convex, extending toward the gate insulating layer.