Patent ID: 11888046
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device, comprising:
a substrate; and
a fin structure on the substrate, comprising:
a first epitaxial region and a second epitaxial region separated by a dielectric region;
a merged epitaxial region on the first epitaxial region and the second epitaxial region, wherein a top surface of the merged epitaxial region is substantially parallel to the substrate;
an epitaxial buffer region on the top surface of the merged epitaxial region, wherein a length of a horizontal interface between the epitaxial buffer region and the merged epitaxial region is greater than a horizontal length of the dielectric region; and
an epitaxial capping region on the epitaxial buffer region and side surfaces of the merged epitaxial region.