Patent ID: 11961839
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device, comprising:
a substrate;
a first active pattern on the substrate and extending in a first direction, the first active pattern including at least one first channel pattern;
first source/drain patterns in recesses in an upper portion of the at least one first channel pattern; and
a gate electrode on the first active pattern and extending in a second direction crossing the first direction,
wherein:
each of the first source/drain patterns includes a first semiconductor layer and a second semiconductor layer, which are sequentially provided in the recesses,
each of the at least one first channel pattern, the first semiconductor layer, and the second semiconductor layer includes silicon-germanium (SiGe),
the first semiconductor layer has a germanium concentration higher than a germanium concentration of the second semiconductor layer,
the at least one first channel pattern includes a plurality of first layers vertically stacked on the substrate,
the plurality of first layers are connected to the first semiconductor layer.