Patent ID: 11948970
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A semiconductor device, comprising:
a first semiconductor fin extending along a first direction over a substrate;
a second semiconductor fin extending along the first direction over the substrate;
an isolation plug interposing between a longitudinal end of the first semiconductor fin and a longitudinal end of the second semiconductor fin, wherein the isolation plug has a first width along a second direction perpendicular to the first direction substantially the same as a width of the first semiconductor fin along the second direction, and a top surface of the isolation plug has a first portion and a second portion lower than the first portion;
a gate structure extending across the isolation plug along the second direction and in contact with the first portion of the top surface of the isolation plug, the gate structure comprising a gate dielectric layer and a gate metal over the gate dielectric layer, and an upper part of the isolation plug having two opposite sidewalls both extending within the gate structure and contacting the gate dielectric layer when viewed in a cross-sectional view taken along a direction perpendicular to longitudinal directions of the first and second semiconductor fins; and
a gate spacer extending along a sidewall of the gate structure and having a bottom surface in contact with the second portion of the top surface of the isolation plug.