Patent ID: 11961731
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 13:
14. A semiconductor structure, comprising:
a substrate;
a source/drain feature over the substrate, wherein the source/drain feature is part of a transistor; and
a source/drain contact disposed over the source/drain feature and electrically connected to the source/drain feature, wherein the source/drain contact includes a first metal-containing layer and a second metal-containing layer surrounded by the first metal-containing layer, wherein the first and the second metal-containing layers include different materials, wherein a lower portion of the first metal-containing layer includes titanium or a titanium nitride and an upper portion of the first metal-containing layer includes a titanium fluoride or a titanium chloride.