Patent ID: 11923359
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A fin field effect transistor (FinFET) device structure, comprising:
a first fin structure extending above a substrate;
a second fin structure adjacent to the first fin structure, wherein the first fin structure comprises an inner sidewall surface close to the second fin structure and an outer sidewall surface away from the second fin structure;
a first liner layer formed on the inner sidewall surface of the first fin structure;
a second liner layer formed on the outer sidewall surface of the first fin structure, wherein a top surface of the first liner layer is higher than a top surface of the second liner layer;
a third fin structure formed adjacent to the second fin structure;
a first gate electrode formed over the first fin structure and the second fin structure;
a second gate electrode formed over the third fin structure, wherein the first gate electrode is separated from the second gate electrode; and
a first gate dielectric layer between the first gate electrode and the first fin structure, wherein a sidewall surface of the first gate dielectric layer is aligned with a sidewall surface of the first liner layer.