Patent ID: 11948936
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 10:
11. A semiconductor device, comprising:
a semiconductor substrate;
an epitaxial stack disposed above the semiconductor substrate, the epitaxial stack including first and second type epitaxial layers, the first and second type epitaxial layers having different material compositions, and the first and second type epitaxial layers being alternatingly disposed in a vertical direction;
a first implant region in the epitaxial stack, the first implant region having a first dopant of a first conductivity type;
a second implant region in the epitaxial stack, the second implant region having a second dopant of a second conductivity type opposite the first conductivity type; and
first and second gate stacks disposed above the epitaxial stack,
wherein the first and second implant regions are between the first and second gate stacks, and in a top view of the semiconductor device the first and second gate stacks are within a boundary of a top surface of the epitaxial stack.