Patent ID: 11901413
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 0:
1. A semiconductor device, comprising:
a gate electrode overlying a semiconductor substrate;
an epitaxial source/drain layer disposed on the semiconductor substrate and laterally adjacent to the gate electrode, wherein the epitaxial source/drain layer comprises a first dopant; and
a diffusion barrier layer between the epitaxial source/drain layer and the semiconductor substrate, wherein the diffusion barrier layer is co-doped with the first dopant and a barrier dopant that is different from the first dopant, wherein a doping concentration of the barrier dopant within the diffusion barrier layer is less than a doping concentration of the first dopant within the diffusion barrier layer, wherein a doping profile of the barrier dopant in the diffusion barrier layer comprises a gaussian distribution.