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

Claim 0:
1. A semiconductor device, comprising:
an active region extending in a first direction on a substrate;
a gate structure intersecting the active region and extending in a second direction on the substrate;
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; and
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 and the second direction,
wherein the source/drain region includes:
a first epitaxial layer including first impurities of a first conductivity type; and
a second epitaxial layer on the first epitaxial layer, the second epitaxial layer 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, and
wherein the gate structure surrounds the plurality of channel layers.