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

Claim 0:
1. A semiconductor device, comprising:
first and second semiconductor fins having longitudinal axes in a first direction and laterally spaced along the first direction;
an isolation plug in contact with a longitudinal end of the first semiconductor fin and a longitudinal end of the second semiconductor fin, wherein the isolation plug has a first sidewall substantially coplanar with a sidewall of the first semiconductor fin and a sidewall of the second semiconductor fin along a direction parallel with the first 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 a second direction perpendicular to the first direction, the gate structure forming a continuous interface with the first portion of the top surface, the first sidewall, and a second sidewall of the isolation plug opposite the first sidewall, and the continuous interface having an inverted U-shape in a cross-sectional view taken along a longitudinal direction of the gate structure, the gate structure comprising a gate metal having a bottommost position lower than the first portion of the top surface of the isolation plug in the cross-sectional view; 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.