Patent ID: 9450097
Filing Date: 2016-09-20
CPC Classification: H01L

Claim Text:
1. A method of doping a fin field-effect transistor (FinFET), the method comprising: forming a plurality of semiconductor fins on a substrate wherein each semiconductor fin of the plurality of semiconductor fins has a top surface and sidewalls; forming a gate stack over the top surface and sidewalls of each semiconductor fin of the plurality of semiconductor fins; removing a portion of a first semiconductor fin of the plurality of semiconductor fins exposed by the gate stack; growing a first stressor region connected to a remaining portion of the first semiconductor fin; exposing a second semiconductor fin of the plurality of semiconductor fins to a deposition process to form a dopant-rich layer comprising an n-type or a p-type dopant on the top surface and the sidewalls of the second semiconductor fin; and diffusing the dopant from the dopant-rich layer into the second semiconductor fin by performing an annealing process, wherein the first semiconductor fin is free of diffusion of the diffused dopant.