Patent ID: 11929314
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A semiconductor device, comprising:
a fin structure;
a conductive structure over the fin structure;
a metal cap, substantially overlapping an entire top surface of the conductive structure, comprising an upper surface that has a generally concave shape and that is at a first height, at a lowest portion of the metal cap, and a second height, at a highest portion of the metal cap;
a dielectric structure above the metal cap; and
a tungsten-based structure above the metal cap and in direct contact with the dielectric structure,
wherein sidewalls of the conductive structure are aligned with sidewalls of the tungsten-based structure, and
wherein the sidewalls of the tungsten-based structure are in direct contact with sidewalls of the metal cap.