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

Claim 17:
18. 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 active portion,
a second transistor of the plurality of transistors has a second active portion,
the first active portion and the second active portion have different material compositions or different material structures,
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.