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

Claim 9:
10. A semiconductor device, comprising:
a conductive 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;
one or more dielectric layers above the metal cap; and
a tungsten-based structure directly on the metal cap and in direct contact with the one or more dielectric layers,
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.