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

Claim 0:
1. A semiconductor device comprising:
a fin protruding above a substrate;
isolation regions on opposing sides of the fin;
a gate structure over the fin; and
a composite liner over the fin and under the gate structure, comprising:
a first layer of a first semiconductor material, the first layer contacting and extending along sidewalls and an upper surface of the fin, wherein a first portion of the first layer along the sidewalls of the fin and a second portion of the first layer along the upper surface of the fin have a same homogenous composition, wherein the second portion of the first layer extends further from the substrate than the upper surface of the fin; and
a second layer of a first dielectric material, the second layer being distal to the fin and disposed between the first layer and the isolation regions.