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

Claim 16:
17. A gate structure of a field effect transistor, comprising:
a first gate dielectric layer;
a second gate dielectric layer; and
one or more conductive layers disposed over the first gate dielectric layer and the second gate dielectric layer, wherein:
the first gate dielectric layer is separated from the second gate dielectric layer by a gap in which a part of the one or more conductive layers is disposed,
the first and second gate dielectric layers include one selected from the group consisting of hafnium oxide, zirconium oxide and hafnium-zirconium oxide,
at least one of the first and second gate dielectric layers includes La as a dopant, and
a dopant concentration is different between the first gate dielectric layer and the second gate dielectric layer.