Patent ID: 11950413
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. An integrated circuit (IC) comprising:
a semiconductor substrate;
a plurality of metal gates disposed on the semiconductor substrate, wherein the metal gates comprise metal electrodes and high-κ dielectrics; and
a plurality of polysilicon gates disposed on the semiconductor substrate, wherein the polysilicon gates comprise polysilicon electrodes and gate dielectrics;
wherein the gate dielectrics have lower dielectric constants that the high-κ dielectrics;
the polysilicon electrodes have larger areas area than the metal electrodes;
the polysilicon electrodes have top surfaces that are coplanar with top surfaces of the metal electrodes; and
one or more of the plurality of polysilicon gates is a high voltage transistor having a threshold voltage of at least 10V.