Patent ID: 9634142
Date: 2017-04-25
CPC Classifications: H01L

Claim:
1. A method comprising: forming a germanium-including fin on a substrate; forming a dummy gate extending over the germanium-including fin, creating a channel under the dummy gate and a source/drain region of the germanium-including fin extending from under the dummy gate on each side of the dummy gate; growing an in-situ p-type doped silicon germanium layer over the source/drain region of the germanium-including fin, the germanium-including fin having a higher concentration of germanium than the in-situ p-type doped silicon germanium layer; and annealing to thermally mix the germanium of the in-situ p-type doped silicon germanium layer and the germanium of the germanium-including fin in the source/drain region of the germanium-including fin and diffuse the p-type dopant of the in-situ p-type doped silicon germanium layer into the source/drain region of the germanium-including fin.