Patent ID: 11948999
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A device, comprising:
a semiconductor fin over a substrate;
a source/drain epitaxial structure over the substrate and connected to the semiconductor fin, wherein the source/drain epitaxial structure comprises a first protruding portion and a second protruding portion connected to the first protruding portion;
a first boron-doped capping layer lining an outer sidewall of the first protruding portion;
a second boron-doped capping layer between and in contact with the first protruding portion and the second protruding portion, wherein the first boron-doped capping layer and the second boron-doped capping layer are made of a same material, and a bottom surface of the first boron-doped capping layer is lower than a bottom surface of the second boron-doped capping layer; and
a metal contact in contact with the first and second protruding portions and the first and second boron-doped capping layers.