Patent ID: 11935791
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 7:
8. A semiconductor device, comprising:
a fin structure protruding from an isolation structure formed over a substrate, the fin structure being made of a semiconductor material and including a first channel fin structure and a first edge fin structure disposed over a bottom fin structure;
a first gate structure disposed over the first channel fin structure;
a first source/drain epitaxial layer disposed in a first trench formed in the fin structure between the first gate structure and the first edge fin structure;
a second channel fin structure disposed over the bottom fin structure;
a second gate structure disposed over the second channel fin structure; and
a second source/drain epitaxial layer disposed in a second trench formed in the fin structure between the first gate structure and the second gate structure,
wherein a volume of the first source/drain epitaxial layer is smaller than a volume of the second source/drain epitaxial layer.