Patent ID: 11901453
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A semiconductor device, comprising:
an active region extending in a first direction on a substrate;
a plurality of channel layers on the active region, the plurality of channel layers being spaced apart from each other in a third direction perpendicular to the first direction;
a gate structure on the substrate intersecting the active region and the plurality of channel layers and extending in a second direction, the gate structure surrounding the plurality of channel layers; and
a source/drain region in a recess region of the active region in which the active region is recessed at a side of the gate structure, the source/drain region being in contact with the plurality of channel layers,
wherein the source/drain region includes:
a first epitaxial layer on side surfaces of the plurality of channel layers in the first direction, the first epitaxial layer including first impurities of a first conductivity type; and
a second epitaxial layer filling the recess region on the first epitaxial layer and including second impurities of the first conductivity type,

wherein the first epitaxial layer has a first thickness on a side wall of the recess region and has a second thickness, greater than the first thickness, on a bottom surface of the recess region.