Patent ID: 11923194
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A semiconductor device, comprising:
a substrate including a first region and a second region, wherein the substrate in the first region is doped with a first dopant, the substrate in the second region is doped with a second dopant, and the first and second dopants are of opposite types;
a dopant blocking layer in the first and second regions;
a first plurality of channel members suspended above the dopant blocking layer in the first region;
a second plurality of channel members suspended above the dopant blocking layer in the second region;
a first epitaxial layer abutting the first plurality of channel members, wherein the first epitaxial layer extends from the substrate and through an opening of the dopant blocking layer in the first region; and
a second epitaxial layer abutting the second plurality of channel members, wherein the second epitaxial layer is separated from the substrate by the dopant blocking layer in the second region.