Patent ID: 11901410
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 14:
15. A semiconductor device comprising:
a first multilayer channel over a substrate; and
a source/drain region, wherein the source/drain region comprises:
a first structure interfacing the first multilayer channel, the first structure comprising a first semiconductor material with a first volume concentration of germanium; and
a second structure interfacing the first structure, the second structure comprising a second semiconductor material with a second volume concentration of germanium, the second volume concentration of germanium being greater than the first volume concentration of germanium and wherein a bottom of the second structure is located below a bottommost surface of the first structures, wherein the first structure interfaces a first channel of the first multilayer channel and also interfaces a second channel of the first multilayer channel.