Patent ID: 11935787
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A semiconductor device comprising:
a gate structure including:
a gate electrode,
a cap insulating layer disposed over the gate electrode,
first sidewall spacers disposed on opposing side faces of the gate electrode and on opposing side faces of the cap insulating layer, and
second sidewall spacers disposed on the first sidewall spacers;

a source/drain epitaxial layer adjacent to the gate structure;
a source/drain contact contacting the source/drain epitaxial layer; and
a source/drain cap layer disposed on the source/drain contact,
wherein the first sidewall spacers include lower portions and upper portions having different material than the lower portions,
the upper portions are connected by a connection part disposed above the gate electrode, and
a ratio H1/H2 of a thickness H1 of the vertical length of the upper portion to a thickness of the connecting part is in a range from 2 to 6.