Patent ID: 9455140
Filing Date: 2016-09-27
CPC Classification: H01L

Claim Text:
1. A method of forming a final silicon germanium material, the method comprising: performing first and second in situ doping, epitaxial deposition processes to form first and second layers of in situ doped epi semiconductor material, respectively, above a semiconductor substrate, wherein one of said first and second layers has a high level of germanium and a low level of P-type dopant material and the other of said first and second layers has a low level of germanium and a high level of P-type dopant material; and performing a mixing thermal anneal process on said first and second layers, wherein said germanium and P-type dopant materials comprising each of said first and second layers migrate from and among said first and second layers during said mixing thermal anneal process so as to form said final silicon germanium material comprising an entirety of said first layer and an entirety of said second layer, an entirety of said final silicon germanium material formed by said mixing thermal anneal process having a high level of germanium and a high level of P-type dopant material.