Patent ID: 11894464
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 14:
15. A semiconductor device comprising:
a fin protruding above a substrate;
isolation regions on opposing sides of the fin;
a composite liner on the fin, comprising:
an interior layer around and contacting a channel region in the fin, the interior layer comprising a first semiconductor material, wherein the interior layer extends continuously along an upper surface of the fin from a first sidewall of the fin to a second opposing sidewall of the fin, wherein the upper surface of the fin is distal from the substrate; and
an exterior layer on the interior layer, the exterior layer comprising a first dielectric material, wherein the exterior layer of the composite liner is disposed between the interior layer and the isolation regions, wherein the fin comprises a second semiconductor material different from the first semiconductor material;

a gate dielectric layer on the interior layer, wherein the gate dielectric layer contacts and extends along the interior layer of the composite liner; and
a gate electrode over the gate dielectric layer.