Patent ID: 11901424
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A device comprising:
an active region;
a gate structure across the active region and extending in a first direction;
a source/drain epitaxial structure over the active region and adjacent the gate structure;
an epitaxial layer over the source/drain epitaxial structure, wherein a maximal width of the epitaxial layer is less than a maximal width of the source/drain epitaxial structure in the first direction;
a metal alloy layer over the epitaxial layer;
a contact over the metal alloy layer; and
a contact etch stop layer lining sidewalls of the source/drain epitaxial structure, wherein the metal alloy layer is spaced apart from the contact etch stop layer.