Patent ID: 11948973
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 8:
9. A semiconductor device comprising:
a semiconductor strip protruding above a substrate;
a first isolation region and a second isolation region on opposing sides of the semiconductor strip;
nanowires over and aligned with the semiconductor strip;
source/drain regions at opposing ends of the nanowires;
a first dielectric fin on the first isolation region;
a second dielectric fin on the second isolation region;
a dielectric structure on the second dielectric fin, wherein no dielectric structure is on the first dielectric fin; and
a metal gate around the nanowires and over a center portion of the first dielectric fin, wherein the center portion of the first dielectric fin is disposed directly under the metal gate, wherein end portions of the first dielectric fin extend beyond boundaries of the metal gate, wherein a first width of the end portions of the first dielectric fin is different from a second width of the center portion of the first dielectric fin, wherein the dielectric structure extends further from the substrate than an upper surface of the metal gate distal from the substrate.