Patent ID: 11950424
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device, comprising:
a substrate;
a first gate electrode disposed on the substrate and located in a first region of the semiconductor device;
a first gate dielectric structure disposed between the first gate electrode and the substrate, wherein the first gate dielectric structure defines a recess recessed from a lateral surface of the first gate dielectric structure;
a first sidewall structure covers the first gate electrode;
a protective layer disposed between the first gate electrode and the first sidewall structure, wherein the protective layer has a protruding portion filling the recess of the first gate dielectric structure;
a second gate electrode disposed on the substrate and located in a second region of the semiconductor device; and
a second sidewall structure covers a lateral surface of the second gate electrode, wherein:
the first sidewall structure comprises a first dielectric layer,
the second sidewall structure comprises a second dielectric layer having a material identical to that of the first dielectric layer of the first sidewall structure, and
a first distance between the first dielectric layer and the first gate electrode is different from a second distance between the second dielectric layer and the second gate electrode, wherein the first dielectric layer has a first length, and the second dielectric layer has a second length smaller than the first length.