Patent ID: 11869893
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 4:
5. A semiconductor device comprising:
a first nanosheet stack over a substrate, the first nanosheet stack comprising a first nanosheet;
a second nanosheet stack over the first nanosheet stack, the second nanosheet stack comprising a second nanosheet;
first source and drain regions on sidewalls of the first nanosheet, the first source and drain regions comprising a first dopant, the first source and drain regions confined to the respective sidewalls of the first nanosheet such that the first source and drain regions do not merge with other source and drain regions on respective other nanosheets in the first nanosheet stack;
second source and drain regions on sidewalls of the second nanosheet, the second source and drain regions comprising a second dopant having an opposite doping type from the first dopant, the second source and drain regions confined to the respective sidewalls of the second nanosheet such that the second source and drain regions do not merge with other source and drain regions on respective other nanosheets in the second nanosheet stack;
an isolation dielectric between the first source and drain regions and the second source and drain regions;
a first wrap-around contact formed over the first source and drain regions, the first wrap-around contact in direct contact with a bottommost surface of the isolation dielectric; and
a second wrap-around contact formed over the second source and drain regions, the second wrap-around contact in direct contact with a topmost surface of the isolation dielectric.