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

Claim 15:
16. A semiconductor device, comprising:
a fin structure extending in a first horizontal direction on a substrate;
a plurality of channels having different distances in a vertical direction from the substrate;
a gate electrode layer extending in a second horizontal direction crossing the first horizontal direction in the fin structure and surround each of the plurality of channels;
a gate insulating layer between the gate electrode layer and each of the plurality of channels;
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;
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 in contact with each of the plurality of channels and a second source or drain layer in contact with the first source or drain layer, and
wherein, on a plane of the semiconductor device that passes through the plurality of channels and is parallel to the first horizontal direction and the second horizontal 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 each of the plurality of channels is convex, extending toward the plurality of channels.