Patent ID: 11949001
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A semiconductor device, comprising:
channel members vertically stacked above a substrate;
a gate structure wrapping each of the channel members;
an epitaxial feature in physical contact with end portions of the channel members and a top portion of the substrate; and
a dielectric feature interposing the gate structure and the epitaxial feature, wherein the end portion of at least one of the channel members includes a first dopant, wherein a concentration of the first dopant in the end portion of the at least one of the channel members is higher than a center portion of the at least one of the channel members, wherein the at least one of the channel members has a length smaller than adjacent channel members, and wherein the top portion of the substrate is free of the first dopant.