Patent ID: 11901415
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC H

Claim 8:
9. A structure, comprising;
a substrate;
a first epitaxial layer grown on the substrate, wherein the first epitaxial layer comprises first dopants;
a first transistor structure on the first epitaxial layer, wherein the first transistor structure comprises source/drain (S/D) epitaxial structures with second dopants of an opposite type to that of the first dopants;
a second epitaxial layer grown on the substrate, wherein the second epitaxial layer comprises a bandgap higher than that of intrinsic silicon; and
a second transistor structure on the second epitaxial layer, wherein the second transistor structure comprises S/D epitaxial structures with third dopants.