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

Claim 14:
15. A semiconductor device, comprising:
first and second semiconductor fins having longitudinal axes in a first direction;
an isolation plug in contact with the first semiconductor fin at a longitudinal end of the first semiconductor fin, the isolation plug being also in contact with the second semiconductor fin at a longitudinal end of the second semiconductor fin, wherein 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 different than the first direction, the gate structure comprising a gate dielectric layer in direct contact with the first portion of the top surface of the isolation plug and a gate metal over the gate dielectric layer; and
a gate spacer extending along a sidewall of the gate structure and in contact with the isolation plug, wherein a bottom surface of the gate spacer is lower than a top surface of the first semiconductor fin and in direct contact with the second portion of the top surface of the isolation plug.