Patent ID: 11955485
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device, comprising:
a first field effect transistor (FET) including a first gate structure disposed over a first channel region; and
a second FET having different conductivity type than the first FET and including a second gate structure disposed over a second channel region, wherein:
the first gate structure includes:
a first gate dielectric layer over the first channel region;
a first work function adjustment material (WFM) layer over the first gate dielectric layer; and
a first metal gate electrode layer,

the second gate structure includes:
a second gate dielectric layer over the second channel region;
a second WFM layer over the second gate dielectric layer; and
a second metal gate electrode layer,

the first metal gate electrode layer and the second metal gate electrode layer are continuously formed and made of a same material,
the first gate dielectric layer is separated from the second gate dielectric layer by a gap,
at least one of the first gate dielectric layer or the second gate dielectric layer includes a dopant, and
a dopant concentration in the first gate dielectric layer and the second gate dielectric layer is different.