Patent ID: 11973078
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A structure, comprising:
a substrate;
a plurality of active portions disposed over the substrate;
a plurality of polarization modulation portions each of which is disposed on a corresponding one of the plurality of active portions; and
a plurality of transistors each formed on a corresponding one of the plurality of polarization modulation portions, wherein
a first transistor of the plurality of transistors has a first gate structure comprising a first material, a second transistor of the plurality of transistors has a second gate structure comprising a second material different from the first material, wherein the first material has a different work function than that of the second material,
a first threshold voltage of the first transistor has a first fixed value, and
a second threshold voltage of the second transistor has a second fixed value that is different from the first fixed value.