Patent ID: 11888028
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 4:
5. The semiconductor device of claim 1,
wherein the one of the pair of source/drain patterns is provided in a recess that is formed in an upper portion of the active pattern, and
wherein the one of the pair of source/drain patterns includes:
a first semiconductor layer covering an inner surface of the recess; and
a second semiconductor layer provided on the first semiconductor layer to fill the recess,
wherein the one of the pair of source/drain patterns contains silicon-germanium (SiGe),
wherein a germanium concentration of the first semiconductor layer ranges from 0 at % to 10 at %, and
wherein a germanium concentration of the second semiconductor layer ranges from 30 at % to 70 at %.