Patent ID: 11894438
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 13:
14. A semiconductor device, comprising:
an isolation insulating layer;
a fin structure disposed over a substrate and protruding from the substrate in a first direction; and
a first layer disposed over an upper part of the fin structure and having an undercut, the first layer being an epitaxial semiconductor layer; and
a second layer formed on and contacting the first layer and at least partially conforming to the undercut,
wherein at least one of the first layer or the second layer has a side face extending in the first direction,
the upper part of the fin structure protrudes from the isolation insulating layer,
the second layer is separated from the fin structure by a dielectric layer, and
the first layer is separated from the isolation insulating layer by the dielectric layer.