Patent ID: 11894448
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. A device comprising:
a first mesa extending from a substrate;
a first source/drain feature disposed in the first mesa, the first source/drain feature having a first dopant;
a second source/drain feature disposed in the first mesa and extending into the substrate, the second source/drain feature having a second dopant at a first concertation, the second dopant formed of a different material than the first dopant;
a channel region disposed in the first mesa between the first and second source/drain features, the channel region including the second dopant at a second concentration that is different than the first concentration;
a gate structure disposed on the first protrusion; and
a pickup feature interfacing with the second source/drain feature, the pickup feature including the second dopant at a third concentration that is different than the first concentration.