Patent ID: 11901361
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A method for forming a semiconductor structure, comprising:
forming a first fin structure, a second fin structure, a third fin structure and a nanosheet stack over a substrate, wherein the nanosheet stack comprises a plurality of nanosheets separated from each other;
forming a high-k gate dielectric layer over the first fin structure, the second fin structure and the third fin structure, and surrounding each of the nanosheets;
forming a first work function metal layer to surround each of the nanosheets;
forming a first passivation layer to wrap each of the nanosheets; and
forming a second work function metal layer to cover the first fin structure, the third fin structure and the nanosheet stack,
wherein the first work function metal layer is complementary to the second work function metal layer.