Patent ID: 9601390
Date: 2017-03-21
CPC Classifications: H01L

Claim:
1. A method of forming a finFET device, the method comprising: forming a fin in a silicon layer of a substrate; forming a hardmask layer on a top surface of the fin; forming an insulating layer over the fin and the hardmask layer; removing a portion of the insulating layer to expose a portion of the hardmask layer; removing the exposed portion of the hardmask layer to form a cavity that exposes a portion of the silicon layer of the fin; epitaxially growing a silicon germanium (SiGe) material on exposed portions of the silicon layer of the fin in the cavity; annealing the grown SiGe to drive germanium atoms into the silicon layer of the fin; removing the grown SiGe material and a portion of the insulating layer to expose the silicon layer of the fin that includes SiGe; and removing the insulating layer to expose an insulator layer of the substrate.